need high quality replacement for a small formfactor lithium battery - Page 1
Forum section: electronics / beginners

author: testtube44
author_rank: Regular Contributor
timestamp: July 20, 2022, 02:52:24 pm
content: i need a high quality replacement for a 3.7v 150mAh lithium cell, with the markings HSZ 502020.my project is time sensitive, i need this now, so i dont really have time for detailed research, please tell me where to buy a high quality replacement.the device is china crap, but i really need the device to work, and while it worked it worked well.after a few months the device killed its own cell somehow, it must have overdischarged it and it wont retain any charge even when recharging for SEVERAL HOURS.the user manual mentioned this problem, that "the battery will discharge over time" essentially, so i need a replacement with good overdischarge protection.please just help me replace the battery, i know its china crap, but it works for what i need to use it for, and i can deal with the rest. thanks!

author: ledtester
author_rank: Super Contributor
timestamp: July 20, 2022, 08:13:12 pm
content: Often the 6 digit number refers to the dimensions of the battery in mm, ie:Is that true of your battery? Do you need one with the same dimensions?Posting a pic of your battery would help.

author: testtube44
author_rank: Regular Contributor
timestamp: July 20, 2022, 08:35:39 pm
content: not a problem. searching the numbers along with "battery" leads to the right size batteries, so the desired form factor can easily be found. you essentially have what you need already.i just dont know where the highest reliable brand is, thats what i want to know.these are also the only markings in the battery.

author: mariush
author_rank: Super Contributor
timestamp: July 20, 2022, 08:44:28 pm
content: 502020 150mAh on digikey :https://www.digikey.com/en/products/detail/tinycircuits/ASR00003/7404516here's a 402025 150mAh, a bit longer but may still fit :https://www.digikey.com/en/products/detail/jauch-quartz/LP402025JU-PCM-2-WIRES-50MM/9560974Sparkfun has a bunch of batteries in stock , check dimensions and see if they could fit451525 110mAh :https://www.sparkfun.com/products/13853one dimension is bigger but maybe your device has a bit extra room.502535 400mAh :https://www.sparkfun.com/products/13851- and also in digikey inventory, same part :https://www.digikey.com/en/products/detail/sparkfun-electronics/PRT-13851/6605199bigger in two dimensions but again, maybe you have some extra room401235 105 mAh would be longer and less wide I guess, like a chewing gum blade, but maybe it fits :https://www.digikey.com/en/products/detail/adafruit-industries-llc/1570/5054546

author: testtube44
author_rank: Regular Contributor
timestamp: July 20, 2022, 08:47:35 pm
content: so the critical question here is, sparkfuns entire website, and digikeys entire website are trustable for this then? if so i can just look up my battery on there.

author: testtube44
author_rank: Regular Contributor
timestamp: July 20, 2022, 09:01:18 pm
content: picked the first option for the battery, thanks!btw i have no room for error it really does need to be at or less than the dimensions.

author: mariush
author_rank: Super Contributor
timestamp: July 20, 2022, 09:03:02 pm
content: Digikey is a well know reputable distributor, Sparkfun is also well known for making hobby stuff (projects, selling components, arduino stuff).Also, they both ship from US and will probably be able to ship by land because lithium batteries are difficult to ship by air.There's also Newark / Farnell (they use Newark.com in US and Canada, farnell.com in other parts of the world but it's same company,same site, same layout) and Mouser.com is also good distributor to buy parts fromOn newark you have 402025 150mAh here :https://www.newark.com/adafruit/1317/battery-voltage-3-7v/dp/18X4012or 503035 500mAh (note wider and longer) :https://www.newark.com/adafruit/1578/battery-voltage-3-7v/dp/52X6819