The best replacement for 18350 is 18650 battery.

The best alternatives to 18350 are rated as following:
★★★★★  18650 battery
★★★★  18500
★★★  18490
★★★  cr123
★★★  14500
★★  16340
★★  18650
★★  rcr123a
★  18650 vamo
★  aw imr 18350
★  one 18650
  efest

Your alternative for 18350 is not listed? Suggest!
Speaking about 18350, one probably shouldn't forget about kick.

Other search terms related to 18350 and their ratings are:
★★★★★ kick
You have in mind a companion for 18350 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 18350 in all years. Click on graph for more.
18350
18650 battery
18500