I've purchased one DLPNIRNANOEVM and trying to buy an battery to power it. I've read the user guide section 4.1, but it didn't tell what kind of battery connector it is. Could you kindly to help:
1. what kind of connector I should choose (as attached pic 1),
2. and which side is positive/negative, No.1 or No.2(pic 2) ?
3. Tenergy 103450 is not available in China. Is a 3.7V 18650 battery with a protection board equivalent with Tenergy 103450?