We all have battery problems on our cell phones with WiFi, 3G, Bluetooth and other paraphernalia. One of the options to increase the time between recharges is buy an extended battery. This is the extended battery Zopo phone ZP-500. Practically ...

A few years ago I found batteries similar to conventional ones, primarily for cree flashlights. I show here these new batteries 18650 and 14500. The 18650 is a huge battery with 3.2V and generally from 2Ah to 5Ah. Are Li-ion ...