If you're a glutton for punishment, you can do this a lot cheaper without any widget stuck on your battery.
Ryobi batteries, being backwards compatible, means they have the entire BMS cutoff circuit built in, so you can use them for just about anything you add on. I mean as a power source for any additional circuit.
This means that due to their legacy design where they have that vertical stem that used to house 1 of the NiCd cells, you have space inside the pack to add a circuit.
The circuit you add can be one of those tiny USB 5V buck converters you can find on Aliexpress for about $2 for a 5 pack, YMMV based on inflation.
You will need some epoxy or hot glue, etc to mount that and some labor to drill a starter hole(s) and file out the space for the USB port. Heh, forget I mentioned it, $20 is not a lot for a pre-engineered solution. I just kinda feel like with Ryobi's batteries already having the extra space in the vertical column, that they should just build that into every battery pack besides their cheapest.
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Ryobi batteries, being backwards compatible, means they have the entire BMS cutoff circuit built in, so you can use them for just about anything you add on. I mean as a power source for any additional circuit.
This means that due to their legacy design where they have that vertical stem that used to house 1 of the NiCd cells, you have space inside the pack to add a circuit.
The circuit you add can be one of those tiny USB 5V buck converters you can find on Aliexpress for about $2 for a 5 pack, YMMV based on inflation.
You will need some epoxy or hot glue, etc to mount that and some labor to drill a starter hole(s) and file out the space for the USB port. Heh, forget I mentioned it, $20 is not a lot for a pre-engineered solution. I just kinda feel like with Ryobi's batteries already having the extra space in the vertical column, that they should just build that into every battery pack besides their cheapest.
Thank you!