bike generator: https://www.instructables.com/Bike-Generator/
electric bike w/ regen, $200: https://spectrum.ieee.org/electric-bike
recycled lithium ion battery project
mfr # 54:
mounting details: https://www.keyelco.com/userAssets/file/M65p35.pdf
Adafruit charger board powerboost 500 1944: https://www.adafruit.com/product/1944
adafruit charger board powerboost 1000 2465: https://www.adafruit.com/product/2465
How to make your Weller wireless: https://hackaday.com/2016/09/01/how-to-make-your-weller-wireless/
use-case -- would like to be able to use any found battery regardless of whether our own rechargeable battery is usable / attached.
notes on building an iOS charger -- https://surfncircuits.com/2017/04/17/build-your-own-super-fast-iphone-and-ipad-charger/#:~:text=The%20iPhone%2FiPad%20will%20charge,pull%2Ddown%20resistors%20to%20ground.
mini boost board from adafriut: https://www.adafruit.com/product/4654
testing linear regs for solar -- https://hackaday.io/project/167731-testing-cheap-linear-li-ion-chargers-for-solar
adafruit universal solar charger -- https://www.adafruit.com/product/4755?gclid=CjwKCAjwj8eJBhA5EiwAg3z0m8pR-K0VVaCii9vLc6v-5gllRUgpaZQn74dGXHO2fr2EmlnLuZs4ExoCacMQAvD_BwE
input -- can take in 5-10V ... so DC-DC input is an option ... as well as 5V solar panels!
adafruit small solar -- https://www.adafruit.com/product/3809
deer solar panel -- https://www.amazon.com/ZEALLIFE-6V-Solar-Panel-Waterproof/dp/B07LD9YN27
cigarette lighter adapter fused https://www.amazon.com/Roadpro-Replacement-Cigarette-Lighter-RPPS-225/dp/B0016LG0CY
basic AC soldering station, weller, $40 -- 40 Watts https://www.amazon.com/Weller-WLC100-40-Watt-Soldering-Station/dp/B000AS28UC