Nightstick 1100 lumen battery life, straight off the spec sheet
The Nightstick 1100 lumen battery life is 3 hours on High. That is Nightstick’s own published figure for the TAC-660XL, the model behind this listing, running the rechargeable lithium-ion cell it ships with. Drop to Medium and you get 8.25 hours. Low runs for 30.
Run time by mode, and what powers it
- High 1,100 lumens for 3 hours, throwing 228 m.
- Medium 550 lumens for 8.25 hours, still reaching 156 m.
- Low 150 lumens for 30 hours at 87 m — ten times the High run time.
- Power A rechargeable lithium-ion pack is included, and a full charge takes 4 hours in the 660-CHGR1 dock.
- Backup Two CR123A primaries will run it, but only with the 500-CARRIER sleeve, which is sold separately.
Every figure here is Nightstick’s published specification for the TAC-660XL.
Nightstick TAC-660XL
Robust design with powerful 1100 lumens
A dual-switch rechargeable tactical light in a 6.25-inch aluminum body. The three modes are spread unusually far apart, which is what makes the run time figures worth reading before you pick a setting.
Nightstick TAC-660XL
What the Nightstick 1100 lumen battery life looks like mode by mode
Every mode trades reach against endurance, and this light spreads the three a long way apart. High throws 228 m, but it is the setting that empties the cell. Low still reaches 87 m, and it does it for ten times as long. So the useful habit is treating High as a burst setting rather than a default.
The run time is not a mystery
Nightstick publishes all three modes: 3 hours on High, 8.25 on Medium and 30 on Low.
Retail listings carry the lumen count and drop the rest, which makes the figure look unpublished. The model number on the listing, TAC-660XL, is all you need to find the full table.
This one runs 3 hours on High — roughly double the class estimate.
Run time depends on the cell and the driver, not on the lumen figure alone. Estimating from category averages is exactly how a light gets sold short by two hours.
Running it on CR123A when the pack is flat
The TAC-660XL also takes two CR123A primaries as a backup, but only with the 500-CARRIER sleeve, which is sold separately. That matters if the light lives in a vehicle, because a flat pack and no carrier leaves you holding a tube. If you are weighing this against a simpler light, our guide to how many lumens an EDC flashlight needs covers the trade-off, and Nightstick’s published specification carries every figure quoted here.
Nightstick TAC-660XL battery life: common questions
How long does the Nightstick 1100 lumen flashlight last on High?
Three hours, on the rechargeable lithium-ion pack supplied with it. That is Nightstick’s published figure for the TAC-660XL rather than an estimate from comparable lights.
How much longer does Low last?
Thirty hours, against three on High. Low still puts out 150 lumens and reaches 87 m, so it is a usable working mode rather than a reserve setting.
What battery does it use?
A rechargeable lithium-ion pack, included with the light. It charges in about 4 hours in the 660-CHGR1 drop-in dock that ships with it.
Can it run on CR123A cells instead?
Yes, on two CR123A primaries, but only with the 500-CARRIER sleeve. That carrier is sold separately, so it is worth buying before you need it rather than after.
Is it waterproof?
Nightstick rates it IP-X7 and drop-tests it to 2 m. IP-X7 covers submersion to one meter for half an hour, which is well beyond rain and splashing.
How far does the beam actually reach?
228 m on High at 13,049 candela, 156 m on Medium and 87 m on Low. Beam distance tracks candela, so the three modes stay useful further out than the lumen drop suggests.
Three hours, and a carrier worth buying early
- 3 hours on High, 8.25 on Medium, 30 on Low
- Rechargeable pack included, 4 hours to a full charge
- CR123A backup needs the 500-CARRIER, sold separately
- IP-X7 and drop-rated to 2 m
The battery question has a published answer and it is a good one: 3 hours at full 1,100-lumen output, rising to 30 hours on Low. The detail most owners miss is the CR123A carrier, which is sold separately and is the only thing standing between a flat pack and a dead light.
