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Now is a good time to talk about batteries and chargers. OpenROV 2.7 is designed to use size 26650 (26.5mm × 65.4mm) Lithium batteries.

Our recommended batteries and chargers can be purchased from our webstore but are dropped shipped and will arrive separately from your OpenROV kit.

Please use caution when dealing with Lithium batteries they can be very dangerous. We strongly encourage you to read this safety bulletin from

If you are going to start the build next, go ahead and start charging your batteries.

It is important to charge your batteries correctly. If you are using our recommended batteries and charger from TrustFire (pictured), it MUST BE SET TO 3.0V..