I bought a few of these LED solar powered lightbulbs from Amazon about 10 years ago.
They are still going strong.
Comes with small Solar panel and built in Lithium battery. ($10 each)
Small Solar is the way to go …
Solar Light Bulbs for Indoor Home and Outdoor Waterproof Camping Lamps for Tent, Rechargeable LED Solar Lights for Cabin, Night, Emergency Power Outage.
2 for $19 : https://amzn.to/3Vn598j
Source: https://amzn.to/3Vn598j
Solar is also the best way to power your BitAxe Bitcoin miner …
BitAxe / Canada : https://d-central.tech/product/the-bitaxe-supra//ref/Offgrid/
BitAxe / USA : https://btcpay0.voltageapp.io/apps/3SanSgGUUpJfkka1xjjrCEWGUkNS/pos
80 Satoshi / TH/s
Braiinspool : https://pool.braiins.com