12V AC DC Charger Power Supply Compatible with Briggs and Stratton Generac B4177GS 01470 7550 B4489GS 193043GS exl 8000 exl Generator Battery Charger Power Adapter Cord
power supply - Hand crank battery charging circuit build - Electrical Engineering Stack Exchange
Generator Battery Charger – PULSERBD
Automatic nimh battery charger circuit cutoff when full - EleeCircuit.com
Automatic 12v Portable Battery Charger Circuit using LM317