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Next we get a new battery

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This new cell is converted to nickel

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Its lugs are made of nickel and the other is made of aluminum

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It will be clearer from this side, this one is made of aluminum

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There are many stores selling batteries in the market now

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They cut off the aluminum sheet and welded a piece of nickel on it

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This is called nickel battery

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This battery is suitable for soldering with a soldering iron

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Because the battery power supply after iPhone 11 is directly supplied to the encryption chip

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If you use that kind of spot welding pen to spot weld,

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there is a certain probability that the encryption chip will be burned out

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Most of us now use a soldering iron to solder

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Let's cut the battery first and cut it to a suitable length

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After cutting, we weld the battery cell and the battery cable together

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Use this soldering iron to solder

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I just did sanding on this adapter piece

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It's easier to tin after sanding

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Give this nickel piece a polish too

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When it is ready, we use tweezers to flatten the front end of the nickel sheet for easy soldering