TTGO T8 V1.7 cannot be powered on from a battery?

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dukeduck
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Joined: Thu Aug 29, 2019 2:06 pm

TTGO T8 V1.7 cannot be powered on from a battery?

Post by dukeduck » Thu Aug 29, 2019 2:19 pm

Hi,

I recently bought 2 TTGO T8 V1.7 (on the board it's printed: T8_V1.7 20180721) ESP32 boards, but neither can be powered on from a 18650 battery. The battery is fully charged and the measured voltage is 4.3V. I also have an older version of T8 which is V1.1 or V1.3, and this board can be powered on from that battery.

Any one had a similar issue?

Thanks,
Kaiyuan

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jimmo
Posts: 553
Joined: Tue Aug 08, 2017 1:57 am
Location: Sydney, Australia

Re: TTGO T8 V1.7 cannot be powered on from a battery?

Post by jimmo » Fri Aug 30, 2019 10:55 am

Do you have a multimeter? Are you able to verify that the battery voltage is still ~4.3V when connected to the board, and then also check the voltage on the ESP32 side of the LDO regulator.

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