Amazon.com: lithium 40v battery
Lasica Replacement for Ryobi 40V Lithium Battery 6.0Ah OP4040 OP4050A OP40601, Compatible with Ryobi 40-Volt Collection Cordless Power Tools Li-ion Battery and Ryobi 40V Lithium Battery Charger. Rechargeable. 4.4 out of 5 stars. 917. $79.98.
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