[speeder]

Anyone tried one? Any recommendations on brands?

Here are a few on Amazon, no idea if they work and for how long:

https://www.amazon.com/s?k=solar+battery+chargers&hvadid=616863042948&hvdev=c&hvlocphy=9199071&hvnetw=g&hvqmt=e&hvrand=9298042467011007537&hvtargid=kwd-2737211381&hydadcr=24632_13611814&tag=googhydr-20&ref=pd_sl_30d4qfw267_e