Building my own lifepo4 battery? - Page 1
Forum section: electronics / general

author: electroniclearner820327
author_rank: Regular Contributor
timestamp: July 21, 2025, 06:33:41 pm
content: I had never given the idea any thought as being something I could do until I just read a comment on another forum:QuoteAlso another one stating it is much cheaper to make your own.I had been considering getting another 12v battery after realizing price wise it would work out the same or even cheaper than getting another laptop that is more energy efficient.Looking on the site which I already bought my current battery, which is highly regarded, I happened to notice they also sell the cells alone and by the looks of it they are a fraction of the price for much higher Ah than the cheapest battery. Seehere.So is it really as simple as the quote above states, for a novice such as myself? I could get wayyyyy more bang for my buck if it is practical. Are there any other costs involved? I don't care about BMS or bluetooth crap. That seems like needless bells and whistles which probably are a large part of the ready made batteries. Well I don't really know what BMS does but it's an optional thing isn't it?

author: Siwastaja
author_rank: Super Contributor
timestamp: July 21, 2025, 06:41:41 pm
content: Yes, it is easy. Setting your house on fire indeed takes literally a few minutes. Different question is, it is easyto do safelyand the answer to that is, definitely no. I don't want to discourage anyone, but this is one of the things where a novice should concentrate on learning first: read, watch videos, simulate what you are going to do before doing it.

author: tggzzz
author_rank: Super Contributor
timestamp: July 21, 2025, 06:44:39 pm
content: Quote from: electroniclearner820327 on July 21, 2025, 06:33:41 pmNo it isn't, and no, respectively.You have to consider thefailuremodes. Since there can be a lot of stored energy, during a failure you can end up with energy in places you reallyreallydidn't want it.

author: electroniclearner820327
author_rank: Regular Contributor
timestamp: July 21, 2025, 06:45:17 pm
content: Quote from: Siwastaja on July 21, 2025, 06:41:41 pmYes I just read another thread and that comment seems to be BS!Also does not seem more cost effective either from what the other thread says, when all the bits are added, so that one seems like a none starter!

author: electroniclearner820327
author_rank: Regular Contributor
timestamp: July 21, 2025, 06:46:08 pm
content: Quote from: tggzzz on July 21, 2025, 06:44:39 pmYes just a quick read of another thread and see it was BS. I will remove the post.EDIT: Ok I am not able to remove the post. Hehe.

author: tggzzz
author_rank: Super Contributor
timestamp: July 21, 2025, 06:48:38 pm
content: Quote from: Siwastaja on July 21, 2025, 06:41:41 pmMake sure the simulations include the chemistry and shape/size of the electrodes, temperature etc.Make sure the videos watched and news reports studied include the words "fire" "explosion" "injury" "destroyed".And then don't do it.

author: themadhippy
author_rank: Super Contributor
timestamp: July 21, 2025, 06:59:26 pm
content: Quoteyoull certainly get a good bang if you get things wrong, an when your insurance company discover it was your home brewed battery going bang that destroyed your home then the buck stops at you as far as paying for repairs go

author: thm_w
author_rank: Super Contributor
timestamp: July 21, 2025, 09:20:06 pm
content: Quote from: electroniclearner820327 on July 21, 2025, 06:33:41 pmYour link doesn't work. Either way, its generally easier, cheaper and likely safer, to buy a premade lifepo4 battery than it is to build your own.Where I live current prices for 12V lifepo4 batteries:- 50Ah $110 USD- 100Ah $150 USD