Description: These are very slim, extremely light weight batteries 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 2000mAh! This battery comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. Do not attempt to charge these with anything but a charger specifically designed for Lithium Ion batteries.
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: Due to the requirements of shipping these batteries, only two batteries can be shipped together at one time and orders may take longer to process and therefore do not qualify for same-day shipping. Sorry for any inconvenience this may cause.
Note: Although these cells are rated for 2C continuous discharge, the wiring and connectors are only rated up to 1A, so be sure to take that into account when determining your power requirements.
Note: Be careful with the JST connectors. They can stick in pretty good and tugging on them can damage the connector. Check this tutorial for an easy way to remove them safely.
Dimensions: 0.25x2.1x2.4" (5.8x54x60mm)
Weight: 36g (1.27oz)
Based on 7 ratings:
It requires a different plug, but the capacity of this is GREAT for powering the Tinyduino. I’ve wired it up with a small cable to change out the plug and keeps the Tinyduino running multiple days as compared to the Tinyduino battery that doesn’t last over night.
We’re using these batteries in a product called the X-harp - an all electronic harmonica, and find that they power our instrument solidly for at least 8 hours - which is awesome for a musician performing live. Some caveats: these batteries store an impressive amount of power - which means that if damaged, they can release an impressive amount of energy. But if they are properly cared for, they are quite safe and very effective.
No setup necessary, plugged into the shield and worked immediately. Instant gratification!
Improvement on a Craig CMA3559 Bluetooth portable stereo speaker. Specs claimed ~3 hrs on the 1000mAh li-po. I was only getting maybe 1.5hrs. Upgrade: removed connectors, stripped wire ends, soldered and heat-shrink insulated two of these 2000 mAh batt’s in parallel with the existing batt. My now 5 Ah mini-bank has been used for over 15 hrs and hasn’t required a recharge yet! Now a better product for the worksite and movies on the phone/tablet!!!
I use this in a classroom setting where it gets handled by a lot of 4th and 5th graders. Considering all of the warnings from Sparkfun about the difficulty of pulling out the JST connector, I anticipated losing a connection from there at some point; therefore I have been extra careful and anxious about it. What did happen is the wire broke off the battery end. This happened fairly recently after we started using it. The negative lead sheared off at the solder point. Fortunately it was an easy fix. The yellow tape came off easily, and the solder point was obvious. One good blob of solder and a few wraps of electrical tape later, and it was as good as new!
With a Sparkfun charging circuit and a little thought, makes a great cell phone portable charger. I’m probably going to put it all in some kind of object that doesn’t look like a charger. That would be less expensive than a retail product and more fun. Read the precautions that Sparkfun provides, they matter.
I’ve bought 4 of these batteries, and they work great