This will help the solder adhere better. “Tin” both sides of the batteries with a small amount of solder, allowing it to cool down before soldering the wires. Keep the time your soldering iron touches the battery terminals to a minimum. The longer the iron is in contact with the battery, the more heat will build up.
If you are going to solder lithium batteries, apply lots of flux to the cell before touching it with the soldering iron. This will ensure that the cell surface is in the best possible state to be soldered which will require less soldering time for a good connection. In this article, we will discuss how to solder lithium batteries.
Step 1: Disassemble the battery pack, if you need to, so you can get to the cells. Step 2: Clean the cell ends so that when you solder, you will be able to make a secure, strong connection. Step 3: Turn on the soldering iron and allow it to heat up all the way.
It is hard to recommend soldering batteries of any kind, but if you have to then use a good solder such as silver bearing solder or something like this. This kind of solder wets fast and doesnt require much heat and comes in very thin gauge wire.
Keep the time your soldering iron touches the battery terminals to a minimum. The longer the iron is in contact with the battery, the more heat will build up. To accomplish this, use a powerful, temperature-controlled soldering iron.
News to all of us who've done it already. You can usually solder to battery endcaps, because they aren't aluminium (which genuinely won't solder). Its not necessarily easy, or advisable, you need a big enough iron, you need to clean and tin the wire and endcap and work quickly. Note the title: "button cell".