Is it safe to leave eyelets connected to the battery once you are finished charging and on the road?

can I use recond mode while the battery is still connected to the car? or do i have to disconnect the battery first and put it in recond mod?

Hi I have the ctek 5.0 and it has been stuck on stage 3 for over 24 hours. Is my battery finished? It’s an exide 95ah 800. Range Rover sport. Thanks

I use mine in a motor home to charge the starter battery, it is difficult to disconnect as it is under the cab floor (Fiat Ducato), so is it okay to leave it connected while I am driving???

I have a Ctek smart charger charger which has been working well, but I have a couple of comments. The first two times I used it, I found that the battery did not get properly charged even though it had reached the “CARE” mode. I used it again last night and monitored the voltage remotely, on my iPad via my car tracker. On this occasion, on reaching the “CARE” mode, I left it a few more hours before disconnecting. This time I found that the battery had reached its capacity.

I have an AGM 95 CA battery that I’m charging with an MSX 7. I think my battery is fully charged but when I charge it it ships through the first 3 stages but takes hours to get to the last fourth light. When it’s on the fourth light and I turn of the charger it again takes at least an hour to go to the fourth stage even though the battery I believe fully charge.

The first time I used it, I connected the negative terminal of the charger straight to the negative terminal of the battery which was still in the car connected. I did not connect the negative to an earthing point in the body work. It charged normally (I suppose), but did I break anything?

my ctek 5 just stays on the orange check light, there is no red light showing. it has been on for quite a while.

I have three MUS 4.3 chargers, and love them. Is the MXS 5.0 AGM function the same and the Snowflake/AGM function on the MUS 4.3?

Recently bought Ctek 5.0 charger. Once it reach to no 7 should I disconnect the charge or let it finish to the end no 8?

My charger just beeped 5 times(i think). There is no beepcode chart in the manual, what does it mean?

Hi ! Can I leave the battery of my Hybrid car connected to my battery charger (MSX 5.0) for an extended period of time (I'm not going to use the car for the next 5 months) ? Or is is better to just let it as is and recharge it (if needed) when I come back ?

When I connect the Ctek 5.0 to my mk3 Ford Focus can I lock the doors ( bonnet closed) and leave it alarmed with no issue to the car in a locked state?

my ctek 5 stays on the check. There is no red light showing up just the orange check light

My MXS 5 Test & Charge charger stays in bulk mode(in bike mode) for almost 6 hours when the sealed lead acid battery(14.2Ah) for alarm system that was being charge has around 12.2 volts still inside. Is that normal? Or I shouldn’t be charging that type of battery using this charger? Please respond. Thank you!

Hi, one last question, can I start my bike/car while the charger is connected (either directly to the battery/ground or through the cigarette lighter) without disconnecting?

Hello CTEK, I have your Lithium US charger connected to my 2023 911 Carrera T. Until a week or so ago, whenever I connected the charger, the unit would move from amber light 2 through to green in about 12 hours. This last week, I can’t get the unit to move beyond amber light 2 no matter how much time has passed. I’ve unplugged and plugged back in several times to no avail. Hard wired to the car via comfort indicator (eyelet). Thoughts on what May be happening here?

What about supply mode? Cant find more informationion about it.

What series do you recommend to buy? Share the link pls.

What's the 'smallest' battery the XS25000 can be used on. Can it be used to charge an AGM 8.6AH (10 hr) motorcycle battery? Thanks!

It's not clear to me whether recond mode can be used with an AGM battery? MXS 5.0 manual says for lead acid and Ca batteries. BUT option for AGM/RECOND is available on the unit. Is it beneficial or detrimental to use this mode for AGM car batteries?

What's the difference between the msx5 and the ct5 "time to go"?

I accidently ordered the ctek for motorcycles. Well it still recharge my dead car battery? I don't care how long it takes.

Is it safe to charge batteries in the home? I have read some things online that you shouldnt do it for whatever reason

What is normal mode??

Is there any audible noise that emanates from the 7002 when set in the recon mode?

Hi, I have a 1993 Miata and in the past I have used the CTEK 56-353 MULTI US 7002. But recently it was damaged in a lightning storm. I don't know whether to buy another 7002 or if the MXS 5.0. I don't understand the difference between the 7002 and the MXS 5.0. I am currently not driving the car at all and have not for months and don't anticipate driving it anytime soon. Thanks for your advice.

To use the recovery it says the battery should be fully charged. I have a agm battery so should I charge fully on the snowflake and then switch to recond? It was deeply discharged so I'm confused which mode to start with since the recond says it should be fully charged first.

Hi I’ve put my new MXS5.0 on my e92 M3 for 5 days now and it’s been sitting at stage 6 for the last 3 days. I expected it to be cycling between 7 and 8 easily by now. Has it got stuck or could there be another issue? It’s on standard car mode + Agm.

What does red lights mean on my CS one charger?

Would I be able to use the MXS 25 to charge a Gel battery? Secondly if I have a 12v 200ah Gel battery, which Ctek charger is best?

Can a CTEK DS250a be used with a Smartpass to charge a Lithium battery?

I do lot of car sound tuning! Should I put supply mode ? Or just charge it ?

is it safe if it finished chargening battery full and i leave cabels connected over night?

I have a Deep cycle Kinetik battery brand new Sealed that was stored for almost 20 months..My ctek 7002. In normal mode It charged to step before last...So I did the reconditioned mode And it fully charged...Was it done properly or I could have done the reconditioning mode from the start???

What is the AGM mode? Charging outside in the winter is fine? (The manual says never charge a frozen battery.)

CTEK don't recommend attaching the negative to the battery yet you sell CTEK CONNECT EYELET for permanent battery connection?

Using Ctek mxs 5, what is the average duration on Recond mode from Stage 4?

All Noco chargers seem to have a bypass/supply mode. Disappointing that it's missing in

Hello looking to replace my ctec charger after 12years of heavy use. I’m unsure of what to buy next and the difference between the “ct5 time to go” and the ”msx 5.0”. I have small motorcycle/Jetski battery’s and agm (90ah) car battery to charge and maintain. I run a total loss system on the Jetski so the battery voltage gets fairly low(red top/odyssey). What would you recommend? Thanks in advance.

With your 2.5m extension lead, can you add multiple extension leads (5metre in total?). Will this be ok with your MXS5.0 on low current motorbike mode?

Hi which solar panels are compatible with the D250SE 200w solar panel and AGM 220w batteries for my campervan conversion

Hi, can i use CTEK for BMW f30 ? Is it okay if i leave CTEK keep connected to the battery for months when ? In case i leave my car for months… thank you

Hi can I use my Ctek mxs 10 charger to charge my motorbike battery?

I had normal mode selected when I charged a AGM battery, have I damaged the battery ?

Can I use AGM mode while charging Renault Nissan 12V - L2 EFB 60Ah 640A (EN) MF with CTEK MSX 5.0 ?

How long should I keep an AGM 12V 20Ah battery on the charger in Recond mode with the MXS 5.0?

Why do you suggest the negative terminal on the body and not the battery?

I have a CTEK MXS7.0 and all of a sudden, no matter what battery I connect it to (good or bad), the first stage light (desulphation) continuously flashes red/orange . Why?

What mode should be used on a CTEK "CT5 Time to Go" to charge a GEL battery? Thank you.

My wife has a mobility scooter that runs at 60v using 5x12v 20ah, after a none used winter period they are as flat as can be, can I parallel them and charge them all with my soon to arrive msx7, or should I break it down to smaller loads, ie 1 or two at a time?

Hi. What charger should I buy for: 1. Lamborghini Huracan? 2. Nissan GTR?

Hello. I have a 12V 80Ah/800A start/stop AGM battery. Now the car won't start and says that the battery is low. I have a Ctek MXS 5.0 Test&Charge charger. How do I properly charge the battery, which mode is best to use? Thank you.

Hi, l have just fitted a Yuasa YBX 9000 AGM to my Mercedes as a consumer battery, which l intend to leave connected on a trickle due to little use. Should l leave it on standard or AGM mode

Hello! Does the EFB battery charge in AGM mode or in normal mode?

I have CTEK MXS 5.0 Charger, is it safe to leave the Ctek battery Charger inside the engine bay while the car is charging? because I want it to be protected from the weather and to avoid getting stolen. thank youu!

Is it safe to charge battery Renault Nissan 12V - L2 EFB 60Ah 640A (EN) MF with CTEK MSX 5.0 (in Renault Captur II) without disconnecting the battery from the car ?

i have two cars a 2006 ford escape and a 2014 lexus es350. what charger would you recommend i get? thanks!

How do I know what stage of charging my CTEK is at? Just drove 6 hours with 14.6V going into my battery from the alternator and during the last hour of the drive it dropped to 13.4V. Thanks

@Ctek My almost brand new mxs 25ec just went blank while charging my bmw. The only light show up is the error light (!) when I plug it into the outlet. Contact support by email twice and haven’t heard back for a week. I didn’t even use it more than 5 times yet. What else do I need to do to get it repair under warranty?

What length are the cables on the mxs 3.8?

Mine is broken already, gets incredibly hot and doesnt charge my agm beyond 2nd light

Can I leave the charger and forget it for months unattended? I rarely use my other cars. Thanks!

Hi Ctek. I would have a simple question. Why should I buy a ctek mxs10 charger and not a Tecmate Optimate 7 charger. I looked at the tests on the net and most of the time there Optimate 7 performed better. The price is the same. Thanks for the help so I can make a good choice.

Hi I’ve put my new MXS5.0 on my new battery, that I purchased new approx. 2 months ago, that died on me for some reason. When I hooked the MXS 5.0 up, I set it on MC, AGM RECOND, the power light came on and stage 1 came on. I left it for 4 days. this morning I went in to check it and the green power light was flashing, and no top lights were lit. I disconnected the charger tried to start, bike was dead. I hooked it back up but only the green power light came on, no top lights lit up in any setting. What does this mean?.

I recently purchased a CTEK CT5 for my Mazda CX-5 which has a start-stop feature. My question is where do I connect the negative clamp - on the engine chassis or the negative terminal of the battery. Please clarify as you mentioned below regarding BMS and I suppose CX-5 has a BMS as well. Thanks in advance.

Can i use ctek's recon mode without detaching the battery from the car?

I have a CTEK MXS 5.0 connected to a 4 month unused 2016 Lexus GX460 truck. The charger is stuck in desulphation mode (1) since 3 days. The first two days was a solid yellow (1), the third day its blinking at maybe 3/4 second intervals. Is this indicative of progress? It is working to restore a battery in pretty bad shape?

Hi. I use mxs7.0 and have a question: Will charger in supply mode charge a battery and keep it charged?

Hi I connect my MXS7.0 to two different car batteries and the mode light comes on and I can select mode but there is no lights on in the top row indicating charge status?

Why do you not connect directly to the battery negative terminal ?

I have the ctek MXS 7.0. Can I safely keep it in supply mode and run 12v appliances from my agm in a battery box while still connected

Hi, I have recently purchased the CTEk MXS 10 battery charger, it appears to have the same problem as a previous comment where its stopped at stage 6, this was connected to my fiat van for 2 days, which had a brand new battery in march, also when the charger was connected to my XF jaguar it never did go to stage 8 either, does this have a issue?

I have just purchased an MXS 10 to charge my AGM battery. The battery is fitted to a 2013 Renault Clio 1.5 dCi (Stop Start). Can I connect the charger and charge the battery WITHOUT first disconnecting the battery terminals? I realise I need to connect the -VE MXS 10 charging lead to an earth on the body/engine and NOT directly on the battery -VE terminal. This idea is alien to me as on all my 'old' cars I have disconnected the battery terminals before attaching a charger. This, I was lead to believe, was to stop the charger damaging the in-car electronics. I sthis not the case any more?

Are you able to use this charge for batteries that are in parallel? For a car with hydraulics

I have an old CTEK Multi XS 3600 that I have used on previous cars. With the recent UK lockdown, I have started to connect this charger onto my AMG battery. I have been advised that I should not use this charger, so the 1st question I guess is, is the correct advice? The next question is, I noticed that you do two battery chargers for a AGM batteries, the CT5 Time to Go and the CT5 Start Stop. Can I ask what the main differences between these 2 are?The other question is, surely if I have a AGM battery, the Time to Go charger offers me better flexibility then the Stop Start charger. Is the Stop Start charger limited only to AGM batteries too? Sorry for the multiple questions, and I hope I'm making sense

Can I jump start my car with an MXS 5.0 Test&Charge?

Can my mxs7.0 charge petrol and diesel batteries ?

I’ve watched 396 videos now and no one ever explains what AGM is. What is it ?

Hi there, if i unplug it for the night whilst it still is going through the process is that ok (i have it on recon), what will happen when i turn it on the next morning?

Hi im wondering if i have to disconnect my ctek xs 0.8 once my motorcyckel battery is back to full power again or can I just leave it I pulse mode. The reason why I'm asking is because my battery is a GEL and maintenance free battery Best regards Alex

yeah i paid almost a hundred bucks for the mxss 5.0, if the battery is dead it will not charge it at all. the first ctek i had was actually a smart charger and would charge a dead battery. now im back to the old standby of hooking the charger up to a charged battery and hooking the dead battery to the charged one, waste of money.

Can I use this charger on my 1982 Corvette while the battery is in the car? There is no place to connect the black ground clamp besides the negative battery terminal (as you show in another video). Will this damage something?

I have a Ctek US 3300 for over a year and it's been flawless. However this year when I've connected the charger and when the battery becomes fully charged, the light correctly goes to green indicating a full charge. What is new this year is that with green light remaining on, the partially charged orange light sometimes comes on in a flashing state. What does this mean, is the charger defective, or is this normal?

Hi my ctek is stuck on small motorcycle and the mode button doesn’t change anything

My new xs power agm battery says charge at 14.4 so should I leave my 7002 in normal or still use agm? Will normal stay at 14.4 or will it spike up at all during charging? Thank you!

Hi, can I charge an AGM battery in my caravan via a Multi XS 15000 charger? Does it have an AGM charging profile? Thanks

I’ve had the MXS 3.8 for a few years now and have been using it to charge batteries of a car and smaller vehicles. Now I bought an Exide Dual AGM EP900 100Ah battery to be used with a trolling motor. I used my MXS 3.8 to do the initial charge, which seemed to work ok. Would you recommend a bigger charger? Would the bigger charger just be faster, or would it have benefits for the longevity of the battery or the charger itself, or would there be other reasons?

On recon step 6 I hear the battery boiling, is that normal?

Can the MXS5.0 charge an AGM Deep Cycle Battery?

Does the recond mode only work on EFB and start/stop batteries or all lead-acid battery?

My MX5 battery charger is stuck in one mode and I am unable to make selections after doing research it turns out the switch is faulty this seems to be a very common problem on this model of charger apart from being disappointed I want to know how I can resolve this issue?

Can you charge/desulphate two 6 volt lead acid batteries wired in series with the 5.0 ctek?

Hello , I have also 12V 90AH 850 AGM start/ stop battery on different car and ctek was showing the low voltage! I charged it using normal mode about 15 hours and got step 7 . When after I checked the voltage it still showed the low. Should I use normal + snowflake mode to get it fully charged or any different ways? I’m using ctek msx 5 test&charge ! Thanks

Hello. I am using for the first time a MXS 3.8. I wish to progress to step 7 Pulse. The charging light is still at Step 3 after being on charge for over 8 hours. The battery is brand new and car has only done 50 miles since battery was installed by the RAC and battery would not have been low. I first assumed that to reach step 7 the battery needed to be fully charged. Was I correct in this or will the charger progress to Step 7 automatically. Many thanks, Alex

Hello, so I used my Ctek mxs 5.0 on AGm 90Ah///900A (EN). The battery was able to run the car but low voltage maintenance lamp illuminated so I decided to cycle it few times with ctek. 1st cycle was standard charging + AGM. It went to green (7th) lamp in about 10 hours. Then i cycled it three times with charging + AGM + Recond mode for about 10 hours at first cycle and 5 hours on third before green light illuminates. I started 4th cycle with same mode charging + AGM + Recond and went to sleep. When I woke up in the morning after about 8 hours charger was still on 3rd lamp. I thought that something went wrong so I decided to restart it keeping the same mode and went to work. When I came back battery was one more time at third lamp after about 9 hours one more time I decided to turn it off and check if everything is alright. Temperature.... of battery was about 50oC and charger even more.I let it cool for about 4 hours then I decided to cycle the battery one more time with the same mode but after few minutes charger was about 50oC so I shut it down and I'm writing :). I bought my charger about 2 years ago, used it several times and was always happy - also on this particular battery. Any idea what happened ? Why first 4 cycles went as usual and 5th 6th stopped on 3rd and battery + charger went so hot ? Battery was off the car during all cycles described above. Your prompt suppor is more than welcome. Charger SN found on white label on bottom is: 56998A33W4001668. Regards, W

Hi, I have AGM batteries. Should I charge the batteries once a year in AGM + RECOND mode to improve capacity?

Hi, I bought Ctek mxs 5.0, just want to know how will I get to step 8. The manual says 10days on step 7, does this mean I need to leave it connected for 10days before I reached step 8? Pls advise.

For an EFB+ battery, which rectifier mode should I use? Thank you

Hi For BMW F30, do I charge it with AGM function