Question Battery Low Indicator?

Joined
Aug 2, 2019
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I've got my N64 portable running on the bench with batteries now. I'm using this BMS (CX-74-2S):
https://www.ebay.com/itm/Intelligent...2S-Packs-18650-lithium-Satellite/311721987212 . It doesn't have a gas gauge nor battery low indicator from what I can tell.

I prefer not to use one of those pushbutton battery level gauges since it would be easy to forget to check when you are playing. My preference is to have a simple LED light up when the voltage of the battery drops below (for instance) 7V. This can be achieved with a voltage reference (EG: TL431) and resistors, but it tends to burn quite a bit of current due to resistors.

So, I was wondering what other's are doing to provide some sort of low battery indicator.
Thank you for the pro tips!
 

Gman

RTFDS
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I've got my N64 portable running on the bench with batteries now. I'm using this BMS (CX-74-2S):
https://www.ebay.com/itm/Intelligent...2S-Packs-18650-lithium-Satellite/311721987212 . It doesn't have a gas gauge nor battery low indicator from what I can tell.

I prefer not to use one of those pushbutton battery level gauges since it would be easy to forget to check when you are playing. My preference is to have a simple LED light up when the voltage of the battery drops below (for instance) 7V. This can be achieved with a voltage reference (EG: TL431) and resistors, but it tends to burn quite a bit of current due to resistors.

So, I was wondering what other's are doing to provide some sort of low battery indicator.
Thank you for the pro tips!
Hello. The N64PMS board is for sale in the store. It eliminates the need for the BMS board and the PTH08080 regulator. It provides play/charge capabilities, custom regulators, a battery monitor for low battery indication, and other neat features.
 
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