$37.99 for Opus BT-C3100 V2.1 with OP3100 ( clearance) & $38.99 for Opus2.2 without using the coupon @GearBest

I wouldn’t mind a resting voltage of a cell even at 4.14v (overnight, on each test). In these tests I made on protected Soshine 2900mah cells, it still had discharge capacities ranging from 2871mah to 2915mah, using 1A, 3A and 5A discharge rates.

See for yourself in the review link below: