Hi, For one of my project, I’d like to power a COB led light ( COB LED Strip Light | Bambu Lab US Store ) using a rechargeable battery ( 14500 7.4V 800mAh Li-ion Battery (1PCS) | Bambu Lab US Store ) via a power distribution board ( Power Distribution Board - 4 Channels (1PCS) - IA005 | Bambu Lab U…

As this need is on my project list, I just cobbled up the various connections. Li-ion 7.4v battery with XH2.54 Power Distribution board XH2.54 to PH2.0 cable COB Light Potentiometer Board with SH1.0 Connector It works for me. Full power via Potentiometer Board. [IMG_1022] Half power via Poten…

Can’t comment on the specifics atm but maybe these recent posts can help? [image] Power System Plan: Models Come Alive! #2 Community Contributions [1_#2_首图_en] In Part 1 , we have learned what parts make up a model’s power supply system and how to combine the …

I would suggest you read ,y response to the fourth in that series where they discuss cables and I detail the mess we currently live in. [image] Power System Plan: Models Come Alive! #4 Community Contributions I really wish MakerSupply parts considered the inco…

perfect, it’s exactly what I was looking for! Have you checked how long the battery can last?

My friend, I only just hooked it up. It will be part of tests I hope to get to later in the week. I also wish to use the battery from the rechargeable kit and using the Li-ion battery in the tests above with the rechargeable kit. I have spares in case I break stuff. I will report back later this…

Thanks, it was just to know if you had data, it’s not that important to be honest. I actually have the same setup as you mention and your wiring looks exactly like mine :slight_smile:

The COB light will have a specified current draw. The Lithium battery has a specified capacity. Battery capacity divided by COB current draw = how long it will run before the battery is fully discharged. Also, the COB will have a voltage specification. It’ll light up brighter if you exceed that lim…

[image] RocketSled: It’s critically important that you use a Lithium battery pack with a built in “BMS” (Battery Management System) or you are risking a battery fire. To confirm, you are implying the CyberBrick kits are liable to catch fire?

COB draw (for the 200mm): 110mA Battery capacity: 800 mA/h If I understand properly, it could last around 7h? But, I see that the LED is rated for 5V whereas the battery generates 7.4V. Does this mean that it will potentially damage the LED if we open the potentiometer to 100%?

Apparently we should be fine here (from 14500 7.4V 800mAh Li-ion Battery (1PCS) | Bambu Lab US Store ): Product Features Short Circuit Protection: The battery has protection for short circuits to prevent damage. Overcharge and Over-discharge Protection: Protects the battery from damage caused …

No. The Cyberbrick batteries are protected. But you can buy batteries from many, many other places besides BBL. They may look the same but that’s no guarantee. So understanding there’s a difference in LiPo battery types is important.

Using a battery to power a Cob led light

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EnoTheThracian March 16, 2026, 9:39am 2

Can’t comment on the specifics atm but maybe these recent posts can help?

I recently used my 4.5V, AAA battery case with a simple switch to power a COB (no distribution board though). No issues.