Beware of the Beam

The slimmest flashlights with 21700 battery

The slimmest flashlights with 21700 battery ranked by specs — with beam profiles and buying options.

1 Nitecore Nitecore P10iX 25.4 mm
  • 4000 lm
  • 158 m / 518 ft / 173 yd
  • 6250 cd
  • Flood
  • 21700 i-Generation Li-Ion
  • USB-C
2 Fenix Fenix PD36R Pro 25.7 mm
  • 2800 lm
  • 380 m / 1247 ft / 416 yd
  • 36600 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 169 g / 6.0 oz
3 Nextorch Nextorch P91 26 mm
  • 5000 lm
  • 300 m / 984 ft / 328 yd
  • 22500 cd
  • Flood
  • 21700 Li-Ion
  • USB-C
4 Nitecore Nitecore MH12SE 26 mm
  • 1800 lm
  • 405 m / 1329 ft / 443 yd
  • 41000 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
5 Olight Olight Baton 3 Pro Max 26 mm black · neutral white 3 colours & light colours
  • 2500 lm
  • 145 m / 476 ft / 159 yd
  • 5295 cd
  • Flood
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 148 g / 5.2 oz
6 Fenix Fenix PD36R 26.4 mm
  • 1600 lm
  • 283 m / 928 ft / 309 yd
  • 19977 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
7 Fenix Fenix E35R 26.5 mm
  • 3100 lm
  • 260 m / 853 ft / 284 yd
  • 15103 cd
  • Flood
  • 21700 Li-Ion
  • USB-C
  • 148 g / 5.2 oz
8 Fenix Fenix PD36R V2.0 LED 26.5 mm
  • 1700 lm
  • 396 m / 1299 ft / 433 yd
  • 39240 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 167 g / 5.9 oz
9 Fenix Fenix PD36 TAC 26.5 mm
  • 3000 lm
  • 274 m / 899 ft / 300 yd
  • 18700 cd
  • Flood
  • 21700 Li-Ion
  • USB-C
10 Nitecore Nitecore MH12 Pro 27 mm
  • 3300 lm
  • 505 m / 1657 ft / 552 yd
  • 63500 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 155 g / 5.5 oz
11 Nitecore Nitecore E4K 29 mm
  • 4400 lm
  • 211 m / 692 ft / 231 yd
  • 11100 cd
  • Flood
  • 21700 Li-Ion
  • USB-C
12 Olight Olight Warrior Ultra 29 mm grey 3 colours
  • 2500 lm
  • 320 m / 1050 ft / 350 yd
  • 26000 cd
  • Flood with wide spot
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 178 g / 6.3 oz
13 Olight Olight Warrior 3S 29.5 mm black 3 colours
  • 2300 lm
  • 300 m / 984 ft / 328 yd
  • 23000 cd
  • Flood with wide spot
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 175 g / 6.2 oz
14 Fenix Fenix PD36R ACE 30 mm
  • 3000 lm
  • 415 m / 1362 ft / 454 yd
  • 43181 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 182 g / 6.4 oz
15 Fenix Fenix PD45R ACE 30 mm
  • 3200 lm
  • 410 m / 1345 ft / 448 yd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 200.5 g / 7.1 oz
16 Nextorch Nextorch E52D 30 mm
  • 3700 lm
  • 280 m / 919 ft / 306 yd
  • 21700 Li-Ion
  • USB-C
17 Nitecore Nitecore P20i UV 31.8 mm
  • 1800 lm
  • UV 365 nm
  • 337 m / 1106 ft / 369 yd
  • 28500 cd
  • 21700i Li-Ion
  • USB-C
18 Nitecore Nitecore P20iX 31.8 mm
  • 4000 lm
  • 221 m / 725 ft / 242 yd
  • 12200 cd
  • Flood
  • 21700 i-Generation Li-Ion
  • USB-C
  • 141 g / 5.0 oz
19 Nitecore Nitecore P23i 31.8 mm
  • 3000 lm
  • 470 m / 1542 ft / 514 yd
  • 55300 cd
  • Spot
  • 21700 i-Generation Li-Ion
  • USB-C
20 Nitecore Nitecore P20i 32 mm
  • 1800 lm
  • 343 m / 1125 ft / 375 yd
  • 29500 cd
  • 21700 i-Generation Li-Ion
  • USB-C
21 Nitecore Nitecore P27iX 32 mm
  • 5000 lm
  • 430 m / 1411 ft / 470 yd
  • 46225 cd
  • 21700 Li-Ion
  • USB-C
  • 201 g / 7.1 oz
22 Fenix Fenix PD40R V2.0 33.4 mm
  • 3000 lm
  • 405 m / 1329 ft / 443 yd
  • 40576 cd
  • 21700 Li-Ion
  • USB-C
23 Fenix Fenix PD40R V3.0 34 mm
  • 3000 lm
  • 500 m / 1640 ft / 547 yd
  • 60954 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 198 g / 7.0 oz
24 Fenix Fenix TK15R 34 mm
  • 3200 lm
  • 490 m / 1608 ft / 536 yd
  • 61000 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 206 g / 7.3 oz
25 Fenix Fenix TK16 V2.0 34 mm
  • 3100 lm
  • 380 m / 1247 ft / 416 yd
  • 36100 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
26 Fenix Fenix TK20R UE 34 mm grey 2 colours
  • 2800 lm
  • 465 m / 1526 ft / 509 yd
  • 53880 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
27 Fenix Fenix TK20R V2.0 34 mm TK20R V2.0
  • 3000 lm
  • 475 m / 1558 ft / 519 yd
  • 56600 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 204 g / 7.2 oz
28 Armytek Armytek Doberman Pro Max 34.5 mm
  • 3000 lm
  • 460 m / 1509 ft / 503 yd
  • Spot
  • 21700 Li-Ion
  • Magnet
  • 203 g / 7.2 oz
29 Nextorch Nextorch P81 35 mm
  • 2600 lm
  • 310 m / 1017 ft / 339 yd
  • 21700 Li-Ion
  • USB-C
30 Nextorch Nextorch P84 35 mm
  • 3000 lm
  • 260 m / 853 ft / 284 yd
  • 17000 cd
  • 21700 Li-Ion
  • USB-C
31 Nextorch Nextorch P84B 35 mm
  • 3700 lm
  • 370 m / 1214 ft / 405 yd
  • 34225 cd
  • 21700 Li-Ion
  • USB-C
32 Nitecore Nitecore EX7 35 mm
  • 6000 lm
  • 400 m / 1312 ft / 437 yd
  • 40300 cd
  • 21700 Li-Ion
  • USB-C
33 Olight Olight Seeker 4 Pro 35 mm black · cool white 7 colours & light colours
  • 4600 lm
  • 260 m / 853 ft / 284 yd
  • 16895 cd
  • Flood
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 205 g / 7.2 oz
34 Fenix Fenix TK17 36 mm black 2 colours
  • 3600 lm
  • 330 m / 1083 ft / 361 yd
  • 27300 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 198 g / 7.0 oz
35 Fenix Fenix TK21R 36 mm black 2 colours
  • 3600 lm
  • 480 m / 1575 ft / 525 yd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 221 g / 7.8 oz
36 Fenix Fenix TK25R 36 mm
  • 3600 lm
  • UV 365 nm
  • 410 m / 1345 ft / 448 yd
  • 28000 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 220 g / 7.8 oz
37 Nextorch Nextorch TA30C MAX 38 mm black 2 colours
  • 3000 lm
  • 390 m / 1280 ft / 427 yd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
38 Nextorch Nextorch TA30D MAX 38 mm
  • 4000 lm
  • 450 m / 1476 ft / 492 yd
  • 50625 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
39 Nextorch Nextorch TA30MAX 38 mm
  • 2100 lm
  • 250 m / 820 ft / 273 yd
  • 21700 Li-Ion
  • USB-C
40 Nextorch Nextorch TA41 38 mm
  • 2600 lm
  • 272 m / 892 ft / 297 yd
  • 21700 Li-Ion
  • USB-C
41 Olight Olight Warrior X 3 39 mm
  • 2500 lm
  • 560 m / 1837 ft / 612 yd
  • 78000 cd
  • Spot
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 204 g / 7.2 oz
42 Olight Olight Warrior X Pro 39 mm
  • 2100 lm
  • 500 m / 1640 ft / 547 yd
  • 62500 cd
  • Spot
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 239 g / 8.4 oz
43 Olight Olight Warrior X 4 39.5 mm 2 variants
  • 2600 lm
  • 630 m / 2067 ft / 689 yd
  • 99310 cd
  • Spot
  • 21700 Olight Individual Li-Ion
  • USB-C
  • 249 g / 8.8 oz
44 Fenix Fenix C7 40 mm
  • 3000 lm
  • 470 m / 1542 ft / 514 yd
  • 55200 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
45 Fenix Fenix C7 Pro 40 mm
  • 4600 lm
  • 339 m / 1112 ft / 371 yd
  • 28866 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 262 g / 9.2 oz
46 Fenix Fenix C7 V2.0 40 mm
  • 3300 lm
  • 575 m / 1886 ft / 629 yd
  • 82566 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 257 g / 9.1 oz
47 Fenix Fenix LD36R 40 mm
  • 3600 lm
  • 385 m / 1263 ft / 421 yd
  • 37100 cd
  • Flood with wide spot
  • 21700 Li-Ion
  • USB-C
  • 231 g / 8.1 oz
48 Fenix Fenix TK22R 40 mm
  • 3200 lm
  • 480 m / 1575 ft / 525 yd
  • 57400 cd
  • Spot
  • 21700 Li-Ion
  • USB-C
  • 218 g / 7.7 oz
49 Fenix Fenix TK22 TAC 40 mm
  • 2800 lm
  • 540 m / 1772 ft / 591 yd
  • 74000 cd
  • Spot
  • 21700 Li-Ion