Replace the battery in the HP Jornada 6xx or 7xx

Рет қаралды 2,544

2 жыл бұрын

At over 20 years old lithium ion batteries wear out even if they are unused, they will have a reduced capacity. Thankfully its fairly straight forward to replace the batteries contained within the battery pack and while we are at it we might as well put a higher capacity battery in there because... why not?
Before attempting this I would recommend protective eye ware and a bucket of sand should it go wrong! I accept no responsibility for any accidents and just because I managed to do it without incident this is not a guarantee that you will manage the same!
Vape image - Photo by Renz Macorol: www.pexels.com/photo/person-h...
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Gas mask - Photo by Erik Mclean: www.pexels.com/photo/man-in-b...
Music - Epic Journey - Yung Logos
18650's from www.fogstar.co.uk
Mini spot welder - Ebay item 6933834692407

Пікірлер: 44

@TheBasementChannel 2 жыл бұрын

I love your commitment to keep using these portable devices in your day to day

@HandheldComputing 2 жыл бұрын

I'm yet to find a better alternative to the J720 :-)

@Durrpadil Жыл бұрын

Ok it's safe to say this can play video. Excellent.

@HandheldComputing Жыл бұрын

It sure can! The only let down is the slow pixel refresh due to the DSTN screen, shame its not a TFT

@Durrpadil Жыл бұрын

@@HandheldComputing Interesting! I will see if I can downgrade video quality to attempt to match the output/hardware and monitor refresh capability. I wish I knew about these before jumping into the Pocket PC scene. I assume the price was the detractor at the time. Thanks for this video! Well done!

@HandheldComputing Жыл бұрын

@@Durrpadil check out DVDcatalyst you can get the old version on HPCfactor, sadly the website for the new version seems to have disappeared. Otherwise have a play with other vide conversion software just watch the bitrate

@John-uc6gb Жыл бұрын

Good video. I have a I have a 690 and a 720, and I love using them. Thank you

@HandheldComputing Жыл бұрын

The 728 is my go to device and the one I compare others too, I only wish the screen had a faster refresh for watching video on, but you can't have everything!

@fradd182 2 жыл бұрын

Thanks for explaining the procedure, especially the re-tagging of new batt cells. I expect to to do several cell replacements in the near future, one of them is for toshiba e800.

@HandheldComputing 2 жыл бұрын

The e800 has a flat battery pack, you should be able to replace its battery with a pouch battery you will just need to solder the pouch battery to the BMS and of course get the correct size to fit the space!

@DavisMakesGames 2 жыл бұрын

Always excited for another one of these videos, keep it up! Love these old handhelds. I bought a Cassiopeia A21S in an ebay lot for super cheap, it uses AA batteries in a cartridge on the back for power. Since the whole thing is removable makes me wonder if there was an 18650 pack available for it since it has a charging port on the device, or if it just used AA rechargable cells.

@HandheldComputing 2 жыл бұрын

It used a NiCd pack. A lot of the early HPCs did, they moved to NiMh before switching to Li-ion with the change to power hungry colour displays. Glad you liked the video :-)

@lamtatyan 2 жыл бұрын

Hi. I have just subscribed your channel just because you start doing repairing video. Hope to see you do more repairing and refurbishing videos for the PDAs!

@HandheldComputing 2 жыл бұрын

Amazing, thank you for the sub. Yes there are more repairs, refurbs and hacks coming :-)

@nelsonmcnamara Жыл бұрын

Just bought a 680e, let see how it goes! never knew what a spot welder was, might need to get one now =)

@HandheldComputing Жыл бұрын

The spot welder is a must if you are doing any amount of battery replacements, safer than soldering and a lot easier!

@funkykoval2099 2 жыл бұрын

This mini welder makes it super convenient!!! I need to get myself one, as soldering is a nightmare

@HandheldComputing 2 жыл бұрын

It is a lot easier than soldering, and while there is still some risk when dealing with li-ion calls I think its the safer option!

@kobe3576 2 жыл бұрын

Related to this, if you have a CLIE PEG-NX70V, you can easily replace the internal battery that is a 900mAh LiPo with a 1300mAh one with dimensions of 60*37*5 millimetres. It just fits enough without stressing anything and you have a bit more than 30% extra battery capacity. I believe some other CLIE PEGs use similar type of LiPo batteries, but not sure though.

@HandheldComputing 2 жыл бұрын

Thank you for that, it's not one I have though I do have the 770C which I suspect uses a similar sized battery

@allstarzero13 10 ай бұрын

Great video, thanks. Did you ever get the "real world" numbers?

@HandheldComputing 10 ай бұрын

Glad you liked the video, I never did run the real world numbers - I use the J728 a lot I get over 15 hours normal use. I will do some tests...

@albertuxus Жыл бұрын

Sorry to ask, but the positive end from the former battery and the negative of the later do not make contact? I don't know how to insulate both batteries if they are in parallel with so little space. Thanks for the video.

@HandheldComputing Жыл бұрын

They don't make contact but it is fine if they do. The two nikel strips connect to the same point on the BMS so it doesn't matter either way

@albertuxus Жыл бұрын

@@HandheldComputing Thanks a lot, it worked!! Keep up the good work!

@HandheldComputing Жыл бұрын

@@albertuxus Glad it worked!

@PrinzMidas Жыл бұрын

Can anyone explaine me the difference of "tagged" and "not tagged" battieres??

@HandheldComputing Жыл бұрын

Tagged batteries have metal strips (tags) attached to the +/- terminals. This is useful as it limits the heat transfer to the cell itself during soldering 😃

@jr4062 Жыл бұрын

What’s an issue with some of these hp and others vintage handhelds, is that the plastic cracks and breaks apart so easily.

@HandheldComputing Жыл бұрын

It is an issue on a lot of vintage devices as the UV breaks bonds in the plastic polymers. The HP ones seem to be the exception the plastics don't seem to have become brittle at all unlike the Libretto CT50 I have which is quite delicate

@HackCausality 2 жыл бұрын

Terrible shame that HPCs never moved beyond DSTN screens. Those passive-matrix displays were just too unpleasant for me.

@RichsRandomRetroReviews 2 жыл бұрын

For the most part they're 'OK' - as long as there's not too much moving on screen, or you're not that bothered about colour reproduction. Some of the PDAs did ship with TFT displays and they were amazing but obviously added to the cost of the device.

@HandheldComputing 2 жыл бұрын

As Rich says they are OK. But I agree the high latency makes them a poor option for video playback and the colour rendition isn't great. That said they offer good contrast and low power consumption so they were the obvious choice... 22 years ago ;-)

@ALEX-gl2yz 2 жыл бұрын

I love STN screens, I like them a lot .. Am I the only one on earth ? I used to hate them like everybody at the time, but with the vintage wave that we're experiencing now, I find them terribly charming and the TFT's absolutely boring. For me, STN is a lot easier on the eyes and it gives me the E ink feeling I was looking for after years of abuse from the TFT aggressive back lighting. I've got an old 486 for the same purpose a few days ago, I enjoy the DSTN screen so much. Then I just ordered another Celeron laptop with a HPA screen which is an advanced STN technology, I can't wait to received it.

@HandheldComputing 2 жыл бұрын

Its true, there is a certain charm to the STN and DSTN screens, I defiantly don't get as much eye strain as much on the Jornada as I do on my IPS phone display... though maybe that's my age!

@ALEX-gl2yz 2 жыл бұрын

@@HandheldComputing I'm very sensitive to computer/mobile phone displays, for me it's night and day. I'm OK with the poor contrast, ugly ghosting etc if I can feel comfortable. I really don't get all the hate over the STN screens in the vintage community. It's like people now running real 8/16 bit computers on new TFT screens, I don't get it. If you're really serious about going back in the past, you should use CRT's, period. Or just stay with emulators.

@oliverpolden 2 жыл бұрын

Popularised by vaping?! The 18650 used to be in pretty much everything long before vaping came along and before the rise of lithium polymer batteries. Today, most devices still use 18650 cells if they don’t use lithium polymer cells. All laptop packs were made up of 18650 cells, they’re used to make up the batteries in electric cars including Teslas. Vaping is literally one product out of millions.

@HandheldComputing 2 жыл бұрын

Its true, in industry and manufacturing 18650's were in common use from the late 90's but for most consumers short of opening a laptop battery pack or ordering a dodgy Chinese torch they won't have seen an 18650 in person. In addition by referencing vaping I am also suggesting an easy place to buy them. But point taken 🙂