Aibocn Shop via eBay offers the EBL 9-volt Battery Charger with four 600mAh 9-volt Rechargeable Batteries, model no. 6F22, for $21.23 with free shipping. That's $3 less than our July mention and the lowest total price we could find by $34. Compatible with 9-volt batteries, it features four individually charged slots, and is globally-adaptable.