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Description
LITHIUM ION BATTERY PACK - 3.7V 4400MAHNeed a big battery for your project? This lithium ion pack is made of 2 balanced 2200mAh cells for a total of 4400mA capacity! The cells are connected in parallel and spot welded to a protection circuit that provides over voltage, under voltage and over current protection. Each cell can provide 1A of current for about 4 hours so all together the peak current you can draw is a little over 1. 5 Amps. Note that these batteries are not designed to sustain
Need a big battery for your project? This lithium ion pack is made of 2 balanced 2200mAh cells for a total of 4400mA capacity! The cells are connected in parallel and spot-welded to a protection circuit that provides over-voltage, under-voltage and over-current protection.
Each cell can provide 1A of current for about 4 hours so all together the peak current you can draw is a little over 1.5 Amps. Note that these batteries are not designed to sustain such high loads, we suggest keeping any constant current draw under 1A.
The packs come with color coded wires, and now they come with a JST 2-pin cable attached for use with our chargers! Because they have a genuine JST connector, not a knock-off, the cable wont snag or get stuck in a matching JST jack, they click in and out smoothly. The cables are rated for 2A so if you use them keep that in mind.
The included protection circuitry keeps the battery voltage from going too high (over-charging) or low (over-use) which means that the battery will cut-out when completely dead at 2.5V. However, even with this protection it is very important that you only use a LiIon/LiPoly constant-voltage/constant-current charger to recharge them and at a rate of 2A or less.
Like most lithium-ion packs, the batteries we sell do not have thermistors built in. This is why we suggest charging at 1/2C or even less - 2A max in this case. Of course, you can charge at a lower rate - it'll just take a little longer to fill up.
Additional safety notes: Do not use a NiMH/NiCad/lead-acid charger! Use a proper LiIon/LiPoly charger for 3.7/4.2V cells. Do not charge unattended. Also, do not abuse these batteries, do not short, bend, crush or puncture. As with all Lithium ion batteries and with any power source - they should be used by experts who are comfortable working with power supplies.
For UK customers only. We do not ship this item outside the UK.
Features
- 2 x 2200mAh Lithium Ion 18650-sized cells in parallel
- Dimensions: 69mm x 37mm x 18mm / 2.7" x 1.5" x 0.71"
- Weight: 95 g/ 3.5 oz
- Max charging rate: 2A
- Max continuous discharge rate: 4.4A
- Datasheet for the individual cells in the pack
- Datasheet for the pack
- Test report for the pack
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 4
Fit great, good price, and fast shipping for a last minute NYE dinner
Let me start by saying that I had very low expectations, all I truly cared about was getting something “blingy” as fast as possible for a last minute New Years Eve dinner. I was impressed by the speed of arrival, price & floored by the quality. Now of course, this is NOT a tailored $300 jacket, but it was great for our evening. Did not shed any sequins, no problems with wrinkles, and didn’t have any weird smells. My husband said it was comfortable, and he plans to wear it again should the need arise.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2024
★★★★★ 5
Quality and cost
Color: Silver, Size: Large
Love this jacket for my husband. True to size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 20, 2025
★★★★★ 5
Classy but stands out!
I bought this jacket for my teen son for homecoming and it was perfect! It was a great fit and the look was just as pictured. I have purchased several things from this seller for formal events and highly recommend them!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 20, 2023
★★★★★ 1
Not what I ordered!
Color: Silver, Size: XX-Large, Color: Silver, Size: XX-Large
I ordered this jacket for my boyfriend for New Years. Not only did it not fit according to the size chart (too small). It was nothing like what was pictured on the listing. The sequins were very light and cheaply sewn on. And the lining and button were WHITE! Not black as pictured. I have never had a problem with anything I ordered from Amazon until now. I returned it and was refunded. But, now have to find a different jacket. NOT HAPPY.
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Reviewed in the United States on December 9, 2019
★★★★★ 5
Good buy
Great fit and I always get lots of compliments on the blazer when I wear it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 28, 2025
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