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Amazon.com: 9v Rechargeable Batteries Kratax 850mAh High Capacity 9volt 6F22 Lithium-ion Battery, 8.7V, 1000 cycles, for Smoke Alarms, Guitar, Cameras, Walkie Talkies, Toy Remotes, Microphones-4 Pack with Charger : Health & Household
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Li-Ion 9V 500mAh (4.5Wh each) Rechargeable Battery ( UN 38.3 Passed)+ 0.3A Smart Charger (9V Snap-on connector) (0.3)
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Discharge tests and capacity measurement of 9 volt transistor radio batteries at high current, 100mA to 500mA engineering data
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