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It is for use only by factory-certified technicians performing authorized warranty service on the Mag-Lite® and/or other Mag-Lite® System™ components.

Your comes completely assembled. Disassembly only will be required when changing batteries or the bulb. It is important that you read the entire manual to become familiar with the product BEFORE you operate and use the .

https://en.wikipedia.org/wiki/Rechargeable_battery

https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery

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