Lithium battery Phaesun Sun Save 12 - 310 H Underseat The Phaesun Sun Save 12 - 310 H Underseat is the most powerful version of the popular Sun Save series and offers an exceptionally high energy reserve in a very small space with a capacity of 310 Ah. Developed for space-saving installation under the front passenger seat, this lithium-iron phosphate battery (LiFePO4) provides reliable energy for an independent power supply - even with very high energy requirements, e.g. when using inverters, air conditioners or extensive solar systems in motorhomes. Despite its enormous performance, the height remains compact enough for the standard seat consoles due to the "H" slimline format. The battery is equipped with an intelligent battery management system (BMS) that takes over all relevant protective functions: overcharging, deep discharge, overheating and short circuit are reliably prevented. It easily replaces conventional lead, gel or AGM batteries - with significantly higher efficiency, longer service life and significantly less weight.