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<p>Migrated reply #2398</p> <p><b>New page</b></p><div>Hi，<br /> <br /> ①T208 is a UPS expansion board, please power to the Nano via T208. Do not reverse power supply!!<br /> <br /> ②The T208 board has a built-in protection circuit, you can also use a 18650 battery with a protection circuit, but please pay attention to the size of the battery, because many batteries with a protection circuit are larger in size. To avoid using the wrong size battery, we recommend using a battery without a protection circuit.</div>

Lisa