Pallus Rechargeable 9v Batteries with Charger, 4 Pack 850mAh Lithium Rechargeable 9 Volt Batteries
Pallus’s 4-pack rechargeable 9V batteries plus a 4-bay USB charger are designed for frequent use in low-drain devices like smoke and fire alarms, as well as tools that take standard 9V batteries (guitars, multimeters, walkie-talkies). The main tradeoff to consider is fit, since the charger is intended for Pallus 9V rechargeable lithium-ion cells, not other 9V battery types.