Submitted by BlitzOrion t3_zjqmpo in science
Taishen007 t1_izyakp8 wrote
Reply to comment by rushingkar in Low-cost battery built with four times the capacity of lithium by BlitzOrion
No need to imagine! I've installed some Gameboy battery mods. They last a long while!
This one claims 30 hours.
https://handheldlegend.com/products/cleanjuice-dmg-xl-rechargeable-battery-mod
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