Post #1795700

2025-09-12 12:07 UTC

I have problem with my Heltec V3 node. I installed a 150 Ah LiPo battery in it, stolen from cat toy. Lasted 2 hours 20 minutes. Now it&#39;s again in state that connecting USB power just lights up the red light. Nothing else. The light went out after a while so I suppose it&#39;s fully charged now. It seems the device doesn&#39;t reset itself to booting state after power is restored. Anyone else noticed this and is there any solution? It&#39;s unusable with battery as it is. #meshtastic #heltec

Replies (3)

@linker3000@mastodon.social 2025-09-12 15:58

@cos I have the same issue. Does the battery have its own management system or is it reliant on the V3? If it doesn't have it's own, the V3 tends to go into a funk as the battery slides through going flat / brownouts and doesn't play nice later. If there's an external BMS that kills the power dead at batt low threshold then turns it on sharp when it's charged enough things tend to work better.

Open ##2010637
@gafu@techhub.social 2025-09-12 20:42

@cos 150 mAh The firmware activated deep sleep after battery voltage goes low. Maybe pressing user button do a wakeup, or wait long time like 24hours until timers let the device wake up again and check battety voltage. Or powercycle it manually when charging.

Open ##2010641
@onechrisn@social.vivaldi.net 2025-09-13 19:58

@cos First I have a 2000 mAh battery and it lasts ~18 hr. and I recharge it overnight next to my cellphone. Second, you should be able to just press the PRG button and it turns back on.

Open ##2010644