Sofirn SC13 SST40 LED with 18350 battery 6000K Keychain Torc, USB-C, Magnetic Base $15.69 + Tax @ Sofirn official via Aliexpress
nedski 
New User Welcome Deal
remember to select picture option green or black “with battery” for $15.69 ( + Tax at checkout) with free shipping which should be cheaper than previous ATL which was $20 (with or without tax?)..
aliexpress coupons also available at the moment if buying in bulk (minimum US$39 spend, codes do runout, depending on item might not apply)
https://www.ozbargain.com.au/node/873500
since a lot of keychain size torches seem to be posted right now. this one is a tiny bit bigger than the others but with extended runtime and higher brightness + magnetic base.
currently $26 on amazon if that suits you (but it doesn’t mention the LED model).
https://www.amazon.com.au/sofirn-Rechargeable-Flashlight-Wat…
Dimensions:
2.84cm x 6.45cm (1.12 in x 2.54 in), weight 40g.
Package including:
**with battery kit:** 1x flashlight, 2x Replace Orings, 1x 18350 battery, 1x USB charger, 1x lanyard
Specifications
Emitter: SST40
Battery Option: 1×18350 battery
Working Voltage: 2.7V-4.2V
Mode Operation: Side e-switch
USB Type-C charging
Material: AL6061-T6 aluminium alloy
Water Resistance: IP68 waterproof
Size: 28.5mm ( head diameter) *64.6mm(length)
Weight: 40g(without battery)
Reverse polarity protection from improper battery installation.
Brightness and Runtime spec:
1300lm = 2 mins (+ 500lm = 1.2 hours)
500lm = 1.5 hours
150lm = 3.5 hours
10lm = 17.5 hours
1lm = 100 hours
source was previous post for some spec: https://www.ozbargain.com.au/node/835201
