It will be interesting for some of us to hear how this battery works out for you as far as range and performance. Price is certainly very good for the spec. What motor are you running?
Bafang BFSWX02 48V 500W
G020.500.DC
The battery pack took 9 working days to arrive - which is about the same amount of time anything else usually takes from AliExpress.
I know from reviews that people buying the 20Ah packs have said it's more like 17Ah so I figured I should get 21.3Ah out of it based on that.
A Russian guy posting a review on the individual 21700 cells, posted an image of 30 cells with the mAh written on each one, so I put every figure in a spreadsheet to get an average, that (on cells rated at 5,000 mAh) averaged out to 4,836 mAh. That works out to 96.72% of the rated capacity. Doing the percentage on 17Ah from a 20Ah pack is 85% of the capacity, so there's quite a discrepancy there, but maybe it differs depending on individual cells Vs a 13S5P pack - or perhaps the guy saying his 20Ah pack was 17Ah was exaggerating a bit, or his equipment was telling him 17Ah when it was more, or both. Doesn't it also get affected depending on the temperature too? A lot of these people are in Russia where it's bladdy freezing lol.
It's been on charge for about 1 hour now for the first time ever, the outside of the battery hasn't changed in temperature and the charger is only slightly warm at one end (it's got a fan in and it's only a 2A charger).
This battery pack has a BMS and the charger also claims to have safety cutoff features. I'm still looking around at it every 30 seconds this first time haha.