Replacement battery and expansion battery string 7 Ah For Schneider Electric Galaxy VS 10-20 kW (slim chassis 333 mm) Consisting of 4 internal hot-swappable battery modules Battery type: VRLA (lead acid) Battery service life: 3-5 years . Runtime extension: At 20 kW: + 5 min At 15 kW: + 8 min At 10 kW: + 13 min . Net weight: 4 x 27 kg . Storage advice: Avoid extended storage of UPS batteries to prevent deep discharge