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Older Revision of Bauer 20V Power Tools Battery Interface

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Bauer 20V Power Tools Battery Interface

The Bauer 20V power tool uses 20-volt lithium ion (Li-Ion) battery packs. The battery packs contains five 3.6v lithium ion power cells that provides 18v and peaks at 20v when charged.

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Bauer 20V Battery Pin-Out

• B+ stands for battery positive terminal.
• TH. It's unknown what this pin is used for. If you have an idea, please share it with us.
• ID. It's unknown what this pin is used for. If you have an idea, please share it with us.
• C1, C2, C3, C4 are terminals used with B+ and B- for battery balancing. They are connected to individual battery cells, allowing the charger to charge them evenly.
• B- stands for battery negative terminal.

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Bauer 20V Power Tool Pin-Out

The following photo is the pin-out from the 20V Cordless 5" Random Orbital Sander with Dust Bag. The tool interface to both TH and ID pins on the battery.

The following photo is the pin-out from the Bauer 20V Brushless Cordless Variable Speed Compact Router. As you can see, it also interfaces to the two middle pins on the battery.

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Inside of a Battery Adapter

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