Recent content by The Battery Doctor

https://www.youtube.com/watch?v=sV7UCvC4OVg

the video you are looking for is: Is this HGJT cheap chinease adjustable battery charger better then the Grin Cycle Satiator? https://www.youtube.com/watch?v=VZWv5iWeHZI&t=1s Also no CE certified chargers have potentiometers on the PCB, only non certified chinease chargers, usually the ones in...

You cannot change ANYTHING on a BionX system, they where the Apple of the ebike world! Ask GRIN! They even modified the MOTORS so they could not be used by anything else then BionX controller! We have repaired a few batteries! First, if charging does not work, install a secondary BMS! We had to...

Looks good, are those A123s?

No reention battery cases are rated for use over 1000W according to producer in germany we work with. Sure it can handle more but it will be a lot of wera and tear, like running a 250W motor on 400W. And to claim 80A is bold! Building good quality high amp batteries and HARD and most batteries...

I can give you some advice for free. Don't trust Headway! The few times we have seen larger (premium) headway batteries they usually have dead cells and large imballance after a few years! And 8AH cannot handle 200A! Thats wishfull thinking. Boosted got busted since A123 2500mah cells could not...

Overcharging does not emediatelly lead to fire, it also takes time, if you leave it on for 12-24H you are sure to see fireworks, especielly if the heat builds up. Looks you are using panasonic cells and they can take alot.

I'm a business client of daly, i can ask them about this, we had one BMS where the LVC did not work, so far. What can i ask them specifically. PM me. There a lots of fakes out there as well, defect being rebranded and sold on aliexpress. Please also send me the url where you bought it and maby...

Always coose Amass XT90s anti spark, cheap, reliable easy to replace,

Since lifepo4 are more expansive they might be selling you Li-ion cells which still work at 2.5-3,3V but have almost no capacity.

If you want a good tester then these are recommended, they are only 150W, but work with up to 150V and are very accurate, have been using such tester daily for more then 5 years, the newest version is great, review: https://www.youtube.com/watch?v=bTzYgee3fHc Aliexpress link...

Lipo cells only have serial numbers, if you are unsure of the chimistry, charge to 3,65V with imax and se if it drops to 3,3V.

No, if there is unbalance then the BMS is not doing its job, or the cells are dying, you can balance them with a hobbycharger but either way imballance will trike again.

I just did this with 4 10S5P packs, i used large 14Awg wires which is over kill. Power will only flow through in series, any imballance will be extremlly small so 24 AWG would work fine if the cells are new or of the packs have very similar capacity.

Do i see someone spreading false rumors? "I know that charging batteries 18650 or other lithium to 80% increases their longevity quite substantially" I made several videos debunking this: Will your Li-ion batteries last twice as long if you charge them to 4.1V...