This kit aimed to save customer money with self serviceable power system replacement. It includes: (2) x 12v 8Ah sealed lead acid batteries to replace aged original batteries, 15% more capacity due to technology improvement.(1) x 2nd Gen 3-stage Smart Charger – High quality charger to replace Bruno Stair Lift Charger Model OEM-2402, BCR-24018. It fits below Bruno Stairlift models: SRE-1540, SRE-1550, SRE-2000, SRE-2010, SRE-2010 Elite, CRE-2110 Curved, CRE-2100, SRE-2750. Do not see your model? Contact us. Batteries features:Each battery is 12v, 8Ah, sealed lead acid battery.Maintenance free non-spillable AGM type battery.Highly rated brand with CE and UL certification.High performance with 15% more capacity than original model.1 year limited warranty against manufacture defects Charger features:3-stage full automatic charging, NO fun, low noise.100v – 240v input, 24V 2Amp output.Short circuit, over current and over voltage Protection.Total cable length 12 Ft.Net weight 1.6 Lbs.UL certified.2 years limited warranty.