will a 3.7v 18650 3600mah or 4000mah battery work and extend the battery life?
1270025
I don't know. You will have to ask Guard Dog. I am getting more than acceptable battery life from mine.
1270026
Depends on whether you buy a reputable brand battery with accurate current rating at this drain rate. Most 4000mAH cells are not rated correctly and will be a disappointment.
1270027
The 18650 battery will work. Its designed to use 18650. However, not sure if quality 18650 batteries come in 4000mah.
629169
All "18650" batteries are the same size. I have 3000mah and 4000mah batteries here and they are both the same size.
2199708
I've been using a mechanical box mod made in the Philippines and using Efest 18650 hi drain battery. Also, I highly recommend LG 18650 35Amps hi drain battery, it last longer than Efest.
2007794
No. While the 26650 is the same length as the 18650 it is considerably larger in diameter. However, they're both 3.7v and if size were not an issue one should be able to use either size.
301160
The 400maH will last longer. As long as the voltage is same, you are good. Let me know if you need more clarification. Thanks, Sanjiv.
17941
I have found that the 18650 3000mAH batteries work very well with it. You can get the inexpensive charger andd use them over and over again or charge up an extra set for when the ones in the flashlight drain down. The specific brand I use is UltraFire batteries.
1023364
18650 is 4mm thicker, and 15mm longer than AA according to what I read. There does not appear to be any extra space in the flashlight battery compartment. I would say no. The 18650 will not fit.
1596771
There is a performance gain by using the 18650 battery. I tried both battery options and found the 18650 to work the best. I have a couple other flashlights that uses the 18650's. I purchased a 12pk of the 6000mAh batteries and that is my recommendation. That last for ever. I hope this helps.
1167505
Yes. It's still an 18650 which is the main part you should be looking for, this battery just has more mAh than the one you're taking about.
503463
Yes, it will work fine. The milliampere /hours of the battery only have to do with power capacity ie batterylife. If the voltage is the same and the battery fits bigger mAh is better. Make sure the new one is therechargable type before you attempt to recharge it.
880858
I own 2 of these lights. It's 3 instead of 2. You want to use the extension and use 3 batteries because this flashlight uses a lot of power. Try to buy your 18650 batteries in multiples of 3... such as a dozen.
540919
I personally don't own that type of battery, so definitely ask the seller, but that being said it does a great job charging my 3600 mah 18650 batteries... As long as the batteries don't require a unusually high mah charge though I would say you probably have a very good chance of it working... Plus it has a good deal of safety mechs on it to correctly identify the right voltage to charge at as well as protecting from over-charging... I would guess it's a safe bet...
732432
The 18650 is a number that represents the dimensions, aka size,, and the mAh amperage current capacity indicates the bigger the better @ same voltage 3.7-4.2 volts,, so YES aim to purchase the higher mAh. There are really COOL Battery Forums that explain in more detail.
629167
Well 4000 is bigger than 3000.... But there is currently no such thing as a 4000mah 18650 cell, and the official UltraFire website does not list these, so they must be fake.
359236
What capacity 18650 battery are you running? I'm using a 3400mAh 18650 and it lasts days for me of itermittent use on level 3-4.
406877
Yes, according to my manufacturer, an 18650 Lithium-ion battery will work in this light. Thank you for your question and your purchase. Have a great day!Don R.
916693
the use of a 18650 battery requires a separate extension piece to accommodate the 18650s length, the one I acquired and works with this flashlight to be able to use the 18650 battery; Vktech Extension Ring Tube Joint Adapter for Bright Flashlight 18650