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Ultra Fire 10440 3.6V 500mAh 2Pack

Price: $4.23 free shipping Satisfaction Guaranteed - or your money back


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- Ideal upgraded power source for BRYNE flashlights
- Charge using BUKTA convenient AC charger
- Ultra-high capacity and premium built quality

- Note: Professional users have tested these batteries' capacity to be 305mAh each and Ultrafire is overrating them as 500mAh. Please read the "measured capacity" forum post below.


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Reviews Return to top    
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This battery are the ideal battery for flashlight BRYNE . There are more flashlights out there that take this battery, but I do not know what they are. They are basically Li-ion rechargeable battery in 3.6V and AAA shape. AA version can be found here.



Showing latest 4 entries. Click here to read all 17 reviews.

Displaying reviews posted by certified DX gadget owners first, followed by all other posted reviews.

Ownership verified by DX lithium rulezz
Posted by buxanto on 7/20/2009
Involvement: General (knows how to use it) - Ownership: 1 week to 1 month

Price: starstarstarstarstar
Ease of Use: starstarstarstarstar
Build Quality: starstarstarstar
Usefulness: starstarstarstarstar
Overall Rating: starstarstarstarstar

Pros: - very good batteries...
- 10440 lithium batteries are lighter and more powerfull compared to normal AAA...
- rechargeable... so many times...
- really cool blue casing...
- ideal combo with http://www.dealextreme.com/details.dx/sku.18630 ...
- i am using them daily...

Cons: - not protected...
- one has died... but it was my fault...

Other Thoughts: - i damaged one, i discharged it so much, that it was impossible to recharge it again...

Bottomline: - i think i will buy another pair of these...or get some for dx points;) nehehe

Ownership verified by DX Review for Ultra Fire 10440 3.6V 500mAh 2Pack
Posted by thirtyfourfifty on 2/9/2009
Involvement: Expert (understands the inner workings) - Ownership: more than 1 month

Price: starstarstarstarstar
Ease of Use: starstarstarstarstar
Build Quality: starstarstarstarstar
Usefulness: starstarstarstarstar
Overall Rating: starstarstarstarstar

Pros: Suitable for any application you can set it to! I have been using a pair in my DIY blu-ray laser for over 2 months and still havn't charged them. The voltage is still above 2.75v which is as low as you would want to take these cells. Their voltage currently reads 3.85v. I will charge them soon for safety. They work superb in flashlights, lasers, Easily power my rc heli making the pack lighter, and it lasts longer than the stanard pack!

Cons: No cons at all.

Other Thoughts: I will be buying a few more sets of these.

Bottomline: Great value for a rare, expertise product.

Ownership verified by DX Great and cheap AAA 3.7V battery
Posted by nightshade on 10/13/2008
Involvement: Expert (understands the inner workings) - Ownership: 1 day to 1 week

Price: starstarstarstarstar
Ease of Use: starstarstarstarstar
Build Quality: starstarstar
Usefulness: starstarstarstarstar
Overall Rating: starstarstarstarstar

Pros: The Ultra Fire 10440 3.6V 500mAh 2Pack is great for my Gilder, I use 2 battery and a BEC, as the size is small and light it is perfect for a 2-3 ft small slope and HLG glider.
I may try using just one cell to lower the weight

Cons: Capacity is lower than the stated, normally they are over rated by 30%.

Other Thoughts: Please make sure the charger can handle size 10440, I am using the following charger
http://www.dealextreme.com/details.dx/sku.4151

Bottomline: Will purchase more of the battery after some test flight if I can get some greate flight time out of them.

Ownership verified by DX Extra output for your flashlight
Posted by compasillo on 7/14/2008
Involvement: General (knows how to use it) - Ownership: 1 week to 1 month

Price: starstarstarstarstar
Ease of Use: starstarstarstarstar
Build Quality: starstarstarstar
Usefulness: starstarstarstarstar
Overall Rating: starstarstarstarstar

Pros: + They perform very well
+ Add an extra power to flashlights (if they admit it, be sure before use them!)
+ Low price for just one 2-pack
+ Short time to fully recharge (less than a hour with sku 4151)
+ You can save money

Cons: - No need to say the output is overrating by manufacturer (almost doubled)
- Not protected, so be careful using them in flashlights with no battery discharge feature (as sku 891). No problem with sku 12062 or sku 11339.
- Not an impressive runtime (around 20 min. at max output)

Other Thoughts: They arrived with 3.2v charge so were ready to use. Very useful for give your flashlights an amazingly power.

Bottomline: Though overrating output, they still are a good choice if you have a flashlight that can be powered up by these batteries. Try and get surprised. Worth the money.

Specifications Return to top    

Voltage: 3.6V (fully charged 3.9V)
Capacity (manufacturer claimed): 500mAh

Length: 1.77 "
Width: 0.39 "
Weight: 0.66 oz

Length: 4.5 cm
Width: 1.0 cm
Weight: 18.80 gram

Usage Instructions Return to top    

Insert this battery to your flashlight with compatible voltage to use.

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