Uploaded April 2021 | Updated September 2026, 7 hours ago

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I've built several Powerstations using RYOBI 18/40V batteries. When the batteries are used in parallel, I always use similar size (Ah) batteries that are fully charged. Several people have asked if there is a way to allow hot-swapping of the batteries or allowing batteries of different charge levels to be used.
I put together a test system using solar blocking diodes. Here are my results

Parts used:
* Heat sinks ( amzn.to/3rSiEuF )
* Watt meter power analyzer ( amzn.to/3dxmwfq )
* 600V/85A Blocking Diode ( amzn.to/3fHIeA0 )
* Ryobi 40V 300W Pure Sine Wave Inverter ( amzn.to/3l7Drui )
* XT60 connectors ( amzn.to/2QdsEBC​ )
* Ryobi 40V 6Ah ( amzn.to/381aWqY​ )
* Ryobi 18V 9Ah battery ( amzn.to/2QXU0Mi )

3D models:
* prusaprinters.org/prints/61098-ryobi-40v-pass-thru-charging-adapters
* prusaprinters.org/prints/41893-ryobi-18v-battery-mini-clip-with-lock-for-diy-proj

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