Thank you for highlighting the lack of protection ! Cheers

If you use batts with built-in protection, then not an issue. I picked up a few to convert a LED lantern from 3AA's to lithium. It worked well. Note, there is a trace from the 4R7 inductor that runs along the edge of the board, If you cut that you can add an external switch. That powers off the boost circuit. The latern I had had apower switch so I added it there so there is no current draw when off but you can still charge the batt.

The voltage disturbance seen when the screwdriver is in contact with the trimpot is unlikely related to capacitance as the feedback divider is relatively low impedance. What you're seeing is likely erratic contact between potentiometer slider and resistive element when screwdriver pressure is applied. The failure mode for those $0.01 SMD trimpots is slider lifts off the resistive element so hopefully the pot is the grounded resistor in the feedback divider where this failure will drop the regulator output to minimum vs. let it fly to its maximum, potentially damaging whatever is connected to its output.

The problem with this board (and a two board solution such as TP4056 + boost board) is that the maximum current it will deliver is 1Amp (shared between battery and external load). If the battery is getting almost flat and you run with a high load (over 500mA say), it will discharge the battery because the load will start drawing from the low voltage battery and then the battery will go flat until underprotect kicks in. e.g. We have a project+AC01+protected LiPo. If the LiPo is flat or nearly flat, and we then connect 5V Power AC adaptor - the project load will fully discharge the battery. If however, the LiPo is well charged when we connect the 5V PSU, the battery will slowly fully charge. Even if the battery is fully charged, the charger will not stop while the load is still on. This will keep a constant 4.2V on the battery. The solution is to wire up either two schotty diodes or a MOSFET+diode. See kzfaq.info/get/bejne/abConMeBsbHSoYU.html and kzfaq.info/get/bejne/ip1goKV5yq-zinU.html.

Thanks for the heads up. The problem with the smd pot is that it's just crap. Maybe you could replace it with a decent one.

Interesting review, as you say it's a shame the module doesn't meet the minimum requirement for battery protection. It is good that you highlighted the problem caused by your natural capacitance when adjusting the output voltage.

Thoroughly reviewed it, and thanks for sharing, I also saw it somewhere 👍

I got this modules few days ago. The batt drained out too bad, then cant be charged. So i contact the supplier, they said it should secured with bms module to avoid batt over discharged

For your last demo, can't we use BMS protection circuit fir lithium batteries?

The new Type C variant is out and it has both overcharge and over discharge protection. I bought 3 of them and they are very cheap. 325 Taka (around $3) with delivery charge.

En la descripción del producto de aliexpress en rojo dice que si tu bateria no tiene modulo de protección debes comprar el modulo con protección incluida. Entoces este modulo del video se puede usar para baterias de celular pero no para baterias 18650 que no traen modulo de protección. Muchas gracias por el video amigo.

Maybe it jumps the voltage because you use a screwdriver with a magnet

I don't see those as problems. But it's output voltage comes with lot of noise, like it is impossible to use in certain circuits. I used it to power a meter but meter is not working due to its noise.

You can buy lithium-ion batteries with built-in protection, or add a small in-line protection module module to an unprotected 18650 for example. You just have to make sure that your battery holder can accommodate the sometimes slightly longer battery. I would have liked to have seen how the output of the module varies with load, perhaps up to about 1A at 5V. Also it would be good to see what noise is present on the output. That kind of information is usually crucial to whether a module is suitable for a particular application.

Yikes, a nasty bit of kit, thanks for the heads-up

Which ic replace with b6283c on this module please make a video on it

To overcome that shortcoming, would it be safe if I added the BMS 1S module? Because BMS 1S can cut off the current if the battery reaches 2.7V

im sure a fixed version will be on sale soon, at least i hope so

Great information the protection is needed.I have purchased one of these boards and added a protection board to the single 18650 cell.It is one that attaches to the + and negative and the feed out is taken from the centre of the board and soldered to the module you use.This adds shorting out protection and over discharge protection so it looks really good.There are modules that do both jobs but the Voltage output is not variable it's set to either 5v 6v 7.5v 9v 19v 12v but as I require 9v to power a radio it should do the job? Thanks agian for great upload.Perhaps there is a module like you demonstrate with protection?Does anyone Know it?

Hi, i have a protected battery and need to power low amp diodes. I can only charge the battery with 400ma max, is there any resistor on the board to limit the amp output ?

Hello, can i ask the current draw on idle when the output have no load? thanks before..

I'm not understanding why you are disappointed with the module. It appears to be functioning within specs. Your complaints: 1) Doesn't have a lot of current draw..... DUH.. you're converting current to voltage in a boost circuit from a single cell. Also.. Nowhere in the datasheet for the SDB628 IC does it say there is a maximum current. The only listed current information is it's quiescent (standby) current dissipation which is 200uA - 2.2mA. however, you're max current on that board is going be around 1A as the design of it is limited. That being said, i sure hope you not expecting to jump-start a vehicle using this tiny little boost circuit anyway, so if needing more than a an amp is a concern for you, than of coarse a little $1 charge/boost module isn't going to cut it. 2) When i bridge contacts in a metal-on-metal SMD Pot using a metal screw driver, things short out............... yep.. every time my guy.. 3) If you know your module doesn't have battery protection, then ensure your battery has battery protection. This is kind of a no-brainer. It's nothing to puck up a small DW01 based module for 18650's. (shocker i know) After watching the video... it seems to me you are having buyers remorse, because you didn't understand the product you bought. It's clear to see just by looking at the module there is no battery protection. If you didn't notice this, it's YOUR FAULT. It's OBVIOUS that you're not going to get more current than a few amps, just by the size of the device, and it's purpose for use. It's designed for small electronic projects, not running a microwave oven off of an 18650. Sorry my guy, but every complaint you have about this device is your own fault. It's like buying a volvo for $5, and complaining you didn't get a lambourghini

Berapa ampere max yang bisa dikeluarkan bila menggunakan battery

can it be used with batteries which include protection themselves?

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