Looking for a flashlight battery to replace AAA's

• Jan 1, 2014

• #1

Tim71

0

Joined

Feb 12, 2010

Messages

35

Points

0

I recently bought a 12 LED flashlight that takes 3 AAA batteries. You install the batteries by placing them into a cylindrical battery case, and slide that into the flashlight casing. What I would like to do is use one short battery (about 34mm or less in length, and about 24mm or less in diameter) instead of three AAA's. Is this possible? Is there such a battery that has the same voltage & mAh as three AAA's?

Thanks

 

• Jan 1, 2014

• #2

rhd

0

Joined

Dec 7, 2010

Messages

8,475

Points

0

18650 is a decent starting point. If it's too long for your host, try 18650, and if it's too thin for your host, try 22650.

Here's a thread discussing:
CandlePowerForums

 

• Jan 1, 2014

• #3

djQUAN

0

Joined

May 27, 2013

Messages

1,154

Points

63

rhd said:

18650 is a decent starting point. If it's too long for your host, try 18650,

Click to expand...

 

• Jan 1, 2014

• #4

jander6442

0

Joined

Jan 8, 2009

Messages

3,145

Points

83

Think he ment 18500.

 

• Jan 1, 2014

• #5

Tim71

0

Joined

Feb 12, 2010

Messages

35

Points

0

Thanks for the responses.

18650 & 18500 are a tad longer than was I was hoping for. I think I found one that might work - 18350 is short enough, and the 18 mm diameter is good, but it is 3.7 volt, 1500 mAh. Will one 18350 battery be sufficient enough to power a flashlight that is meant to use 3 AAA's?

 

• Jan 1, 2014

• #6

djQUAN

0

Joined

May 27, 2013

Messages

1,154

Points

63

3.7V is nominal voltage for lithium ion. 4.2V fully charged.

 

• Jan 2, 2014

• #7

BShanahan14rulz

0

Joined

Dec 29, 2009

Messages

3,136

Points

63

Chances are, all LEDs are in parallel with the battery. If is a fancy model, it will also have a resistor based "driver." If it has a resistor, it will be more likely to work. Without one, it probably will still work, but be mindful of burning out LEDs on a fresh battery.

 

• Jan 2, 2014

• #8

123splat

0

Joined

Jan 14, 2011

Messages

424

Points

0

22650 is a hair too long to directly replace the 3 AAA cell adapter, but it can be crammed in. You may have to cut the spring on the end cap. Diameter is just about perfect.

 

• Jan 2, 2014

• #9

ImA4Wheelr

0

Joined

Nov 28, 2013

Messages

123

Points

18

An unprotected 18500 should be just about the same length as a typical cylindrical 3AAA holder. I use 18500's in all my 3AAA flashlights. Just need a little cardboard/plastic to prevent sideways rattling.

 

• Jan 3, 2014

• #10

jander6442

0

Joined

Jan 8, 2009

Messages

3,145

Points

83

You could use a 22500 good luck finding them. They are out there so keep looking.