View Full Version : 18650 battery expert question

02-14-2011, 11:46 AM
So i own a hellfighter x8 and some vintage surefires. I was reading up on being able to replace my cr123's With an 18650 rechargable. I ended up buying a $10, two 18650 3000mAh with charger. Got my batteries today and they are like 1mm too wide to fit in my lights.

I am guessing they are cheap out of spec batteries correct?

What brand should i use, and at what mAh? Should i use a different charger too?

Its not even worth trying to return this battery charger set i ordered haha

02-14-2011, 11:55 AM
The batteries are probably fine, you just bought the wrong size. ;) (I bet you need 17670's) You're also going to have trouble with the voltage.

02-14-2011, 12:01 PM
Do they change in size when the mAh is higher. I read people were using 2400mAh. So i figured 3000 mo powa!

Now with a little more reading about crappy baterries i noticed that mo powa doesnt mean reliability haha.

02-14-2011, 12:03 PM
And i dont know much about them so i kind of just leaped right into it.

Im use to Simple maglights. I was given a few surefires and this hellfighter. Im a tinkering man soo :)

02-14-2011, 1:20 PM
i run these 18650 batteries in my cheap solarforce LP2 body (similar to SF 6P) with M61 malkoff drop-in...


my friend is a flashlight nerd and he told me these are good batteries

mine work, but the batteries are a little to skinny so i just put a little bit of electrical tape so they wont rattle...

i took some batteries out of old laptops and those also work ok(also 18650), capacity i think is around 1200-1600mah (not sure) and these are defenetly shorter in lenght then the ones in the link, i just used small magnets to make up the differance.

not sure if i help, i will try to post up pics...also im no expert


02-14-2011, 7:12 PM
this is the bs i bought. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200478630225&ssPageName=STRK:MEWNX:IT

lol i guess i'll try the laptop battery thing since i have one and figure out what to order.

i have this sony 14.8v/4000mAh. so do i just open it up and extract the batteries or am i going to blow up? haha
just tried it. battery is exactly the same size as the one i bought