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Gens ace 400mAh 7.4V 2S1P 35C Lipo Battery Pack with JST-PHR Plug-Bashing Series - Gens Ace
Amazon.com: Rechargeable Lithium Ion Battery Pack - VIDAR 7.4V 2600mAh High Capacity Li-ion Battery Pack with JST PH2.54/2P Plug-in(Customizable) for Electronics,Toys,Lighting,Equipment : Health & Household