rollingfieldz said:
Hello all, Has anybody dealt with this guy or recently tested any of these?
https://www.ebay.com/i/313017291213?rt=nc&_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D2%26asc%3D20160908110712%26meid%3D5a47c5a59f2640d59208e6ca47a5cb87%26pid%3D100677%26rk%3D12%26rkt%3D30%26mehot%3Dnone%26sd%3D223926964270%26itm%3D313017291213%26pmt%3D0%26noa%3D1%26pg%3D2386202%26algv%3DDefault
At that price, those cells had better meet or exceed their spec.
On the other hand, it’s no big risk to buy a box and test them out yourself.
I’ve been helping a friend of mine build and test packs with some old stale versions of the same cells, which he bought super cheaply. None of them have been cycled many times, but their behavior so far is not great (awesome for the price, however). The charger I use terminates at about 3.54V per cell, and it turns off when it reaches full charge. The cells quickly drop to about 3.34V per cell at that point. On discharge, they yield a little over half of their rated capacity, and when the pack’s resting voltage reaches about 3.0V/cell, the BMS cuts off under load and stays off.
When recharged, they take about 110% of the measured discharge before the charger cuts off.
I’m hoping some exercise will make them perform better, but even at this level they’ll be acceptable for their purpose— lighting and e-assist for pedal powered parade floats.
The batches of cells I’m working with have date codes. If the ones in the eBay listing are of recent manufacture and do what they claim to do, they should be fine. Not high performance by any stretch, but worth the price.
