... memory effect, CE, ROHS are approved ni-mh battery products with high quality ,competitive price. Model: ... best peromance.2) Avoid reverse charging. Check battery polarity before charging.3) Do not mix different ... MH,NI-CD,alklaline etc.)Capacities and brands of batteries at the same time in the electrical ... )If the performance of the batteries decrease substanity, it is time to replace the battery.7)Do ...