Haoxin li-ion battery allows solar charging

Suitable for Nokia's 5110, 6110, 6150, and 7110 mobile phone models, the TN-3.6-1000 li-ion battery from Shanghai Haoxin Science and Dev. Co. Ltd features a photoelectricity converter that refills the battery when no independent charger is available.

At a standard illumination of 1kW/m2, the converter provides an efficiency >15 percent. In addition, the company claims that the battery can last 30 days given sufficient illumination.

The 3.6V device has a 1Ah capacity and 66h to 300h standby time. Also included is a protection circuit that addresses overcharging, overdischarging, reverse charging, and short circuits.