Recent content by Pajda

Small update: - added more cycles

Small update Update: - added more cycles at 90% and 100%. - Lishen 58SK finished 1,000 cycles in both DoD tests with outstanding results. I will continue with the test up to 2,000 cycles or sudden death.

Can you provide link on alibaba to some seller who can sell these cells in sample amount like 2 pcs and send them in Europe? Do you know if they also produce smaller cells with this technology, say up to 50 Ah?

This is a good question. I still have no confirmation who is the manufacturer of the F60 series from Vapcell. It was my speculation that FEB might be the manufacturer, because at that time I had no information about any other manufacturer that had 6000 mAh cells in their lineup. Also, to this...

Small update: - added more cycles

This is more of a commercial reason ;), where the average user is not interested in the principle of electrochemical cells, but only in the charging time. I called it as “True C-rate” charging test. I ended up at 4C with P50B because of the limitation of the current tester to 20A. For higher...

Small update Update: - added more cycles at 90% and 100%. - Samsung "58E" begins to die after 600 cycles at 100% DoD :( a similar fate is waiting for the Samsung 53G1. I would recommend to wait for the "2" generation, which is common rule in Samsung production line. More to come: Vapcell...

Small update Update: - updated table and 1C discharge chart with BAK 55E and 58E results. BAK 58E, despite its higher capacity, has a slightly worse energy density than 55E. Cycle life tests already running.

These LG M52s are out of stock for several months. I couldn't find them anywhere else :(

I noticed that Vapcell recently released their new products Vapcell N41 @ 4050 mAh in 18650 New Release Highest Capacity Vapcell N41 18650 3.7v 4050mah 10a Li-ion Rechargeable Battery For Flashlight - Buy 18650 4050mah Li-ion Battery highest Capacity Vapcell N41 18650 4050mah 18650 3.7v 4050mah...

Small update Update: - updated both 5300mAh+ charts + LFP JGNE 2200mAh

Small update: - added more cycles

Did I miss them? Nkon says they have them on pre-order with delivery at the earliest 04-06-2025. By the way BAK 58E has been stocked in Poland and ordered today.

Small update: - added more cycles - 500 cycles at 4C @ 15min continuous charge-rate with no problem

Samples of BAK N21700CK-55E arrived today, I'll start testing them right after Easter. BAK 58E should hopefully arrive by the end of the month.