ARB-L4-4800 is a high capacity 26650 Li-ion rechargeable battery specially designed for the Fenix FD40 and PD40. Outstanding performance, excellent reliability and compact design, it is the best match for your high-drain devices.
Good to keep an old flashlight going but seems to be old technology...
Fenix ARB-L4-4800 Using this battery in an FD40.
Working on a vehicle where I had the FD40 on its highest setting, it lasted about 30 seconds before the battery shut down. Thought it was the FD40 so I replaced the battery with same, with the same result. The second battery quit the same way. Now I never use the highest light setting, so everything works fine.
I'm thinking that my flashlight can exceed the current limits of the battery.
Love the FD-40 mainly because of the focus feature. Love the battery because of the 4800 may capacity.
Wish I could change the max current draw for my light.
It's a good high capacity battery
Worked as expected, also great customer service. If i have more need for unique batteries i will definitely reach out again.
Really great battery I can sure see the difference it makes!
Great product!! Fast shipping!! Great price!! Highly recommended!! I've told all my emergency services friends and coworkers!!
Fenix batteries are proven to be reliable, good quality, lasting.
Product is as advised. Battery is improving as it is being used