Ultratac K18

LED Flashlights – General Info 1 x AAA Flashlights
1

I just picked up an Ultratac K18 and would like recommendations for a lithium ion battery for it. Any suggestions would be much appreciated.

2

I use this Efest cell my 10440 lights. Not a ton of options, but this is a good one.

3

Thank you, yeah been looking around and not seeing much in the way of 10440’s. Not many brands seem to exist. Was not sure if i should use protected cells in the K18.

4

^ + 1

5

Better customer service and cheaper!

Probably get there quicker as Phoenixville, PA. is only 400 miles from Cleveland,the city of my Birth! :+1:

https://liionwholesale.com/collections/batteries/products/efest-imr-10440-aaa-size-350mah-3a-li-mn-button-top-battery-wholesale-discount?variant=3077507268

6

You can get a little charging adapter for the K18, It screws on instead of the head and has an micro-usb port.

John.

7

John,
Do you have link to get one?

8

Loads on eBay, maybe Amazon as well 5-10$

http://www.ebay.co.uk/itm/UltraTac-USB-Charger-for-K18-Flashlight-/152179559916?hash=item236e9bcdec:g:D6cAAOSwIgNXlOoM

John.

9

I have a couple of the Stainless Steel K18 myself, there is now a higher lux version with an steel button, instead of the rubber one.

A great price for an SS K18 if you don't mind waiting a while.

http://www.ebay.co.uk/itm/Portable-UltraTac-Mini-K18-Cree-XP-G2-S2-LED-10440-AAA-Keychain-Flashlight-Hot-/302081681269?var=&hash=item465578a775:m:mE0VkQR0_ns4sOTbIYzg94A

John.

10

Got It thanks, Hey $29.98 USD on Amazon on this side of the pond, this is the entire light with battery and USB charge module

Ultratac K18

11

the SS version is the older model

12

I just saw that yesterday and now im going to order it as well. Funny thing my light was delivered to me yesterday and it was missing the pocket clip.

13

Wow that is a great price, thanks. Awsome about being born here. I moved here from Portsmouth about a year ago.

14

I got my from this link, $22.59 and it got to me in 1 day.
https://www.amazon.com/GranVela-UltraTac-Flashlight-Waterproof-Torch-Blue/dp/B01BS8OCBA/ref=sr_1_fkmr1_1?ie=UTF8&qid=1491272534&sr=8-1-fkmr1&keywords=ultratac+k18+usb

15

So anyone know if these Soshine 10440’s are any good? They claim to be protected cells and good for up to 2 Amp draw.
https://www.amazon.com/dp/B018TNZ0IG/ref=wl_it_dp_o_pC_nS_ttl?\_encoding=UTF8&colid=2HAJN9MJ5KKHS&coliid=I3U1ETY8W6MQJ6

16

I would avoid So shine as they only ever give 2/3 of the stated capacity, I have seen the Effest cells recommended before and wish I could get them in the UK

John

17

Available here: http://www.allbatteries.co.uk/lithium-rech-industrial-battery-imr-10440-v1-aaa-li-mn-3-7v-350mah-ft-acl9022.html

Not used them myself , though

18

Also does the K18 work with flat top cells?

John

19

The problem with li-on 3.7v cells is they start off super bright and then there is a sharp drop especially on high mode as the K18 is not regulated , Check some reviews of the K18, I thought about getting some LiFePO4 cells 3.2v as the discharge curve is virtually flat till they are empty, but they are only half the capacity of 3.7v cells and you cannot use the K18 charging adaptor with them.

John

20

The K18 has a bottom spring but the top is just flat pcb. Not so sure a flat top could make contact.