Top-battery powered devices - substitute for batteries

Use these batteries in a high-power LED flashlight, which draws a lot of power. Past experience (for long-term stability / self-discharge I can not say) after a few charging cycles is very good. The term corresponds to the good (and expensive) batteries, also the brightness of the lamp is comparable. The voltage of the batteries appears to be slightly higher than the usual 1.2 V.

Due to the extremely high capacity is a fast charger for continuous use is indispensable.

According to my previous experience to me the price seems reasonable.