This is an extremely tiny and light weight battery based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 40mAh. This may sound like not so much power, but the cell is really tiny... like, about half an inch square!
Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized Lithium Polymer charger. Battery includes built-in protection against over voltage, over current, and minimum voltage. Please use caution when using this battery in wearable projects. When using conductive thread, a short in the thread can create sparks and heat. We recommend using coin cell batteries for beginners.
Note: This battery is not available to ship to Alaska or Hawaii, or through any express services (2-day, overnight), or internationally. This is temporary! Check out our blog post for more information. Additionally orders may take longer to process and therefore do not qualify for same-day shipping. Sorry for any inconvenience this may cause!
Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please do not hesitate to contact us to see if further actions may be taken.
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
See all skill levels
Based on 1 ratings:
One of the three units I ordered was defective, but you quickly sent another unit to replace the bad one. I appreciated your prompt service, and will be looking at your website to see what other items I need. Regards, William Hanshaw
Looking for answers to technical questions?
We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.
Log in or register to post comments.
What chip is on here that's doing overcharge protection(?) It's not shown in the data sheet (or I missed it). If that's the case, can't we simply charge these by using current limiting with a simple resistor?
I make my own design with the LTC4081 from Linear or the STNS01 from ST.
How can you charge one of these little 40mah lipos?
I guess there is a mistake in the Datasheet. The black wire is written as + and the red wire is written as -.
What can we use to charge these? I don't see any charger boards in your catalog that do anything under 100mA...