Replacing the old battery on rechargeable bike lights

A ten-year-old rechargeable bike light needed a new battery, so the reporter decided to try fixing it at their local queer makerspace. The bike lights were silicone and the reporter cut them open, exposing the circuit board. They removed a few screws out of concern for losing them and carefully took out the circuit board. The reporter had no experience with desoldering, so they consulted an iFixit guide and asked friends for help.

The steps they followed were based on the guide and advice from their friends. The battery had markings like "3" and "LI???77", which the reporter used an LLM to look up and found the battery model to be "LIR2477". The reporter bought the battery and glue online, which cost around $20 CAD. After waiting for the glue to dry, they reassembled the bike light and waited 24 hours for the glue to cure.

The lights worked and have not required recharging since, though the reporter has yet to determine the battery's lifetime. The reporter also disposed of the old batteries at a nearby recycling center.