Power Sonic has been a leading force within the battery storage industry for nearly 50 years. Power Sonic’s range of battery products includes Sealed lead acid (SLA), Lithium Iron Phosphate (LiFePO4 Batteries PSL and SC Series Connectable and Bluetooth), Lithium Battery Chargers. Powersport Batteries. NiCd/NiMH battery chargers. SLA battery chargers (automatic dual rate and float models).