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document updated 2 months ago, on Mar 18, 2024

products I own, 3.7V Li-ion-related

Nitecore UMS4 — battery charger

[manual]

Batteries compatible with:

XTAR PB2S — USB C power bank

[manual] (backup)

QC3.0 and PD3.0 fast charging

Batteries compatible with — 18650, 18700, 20700, 21700

flashlight — Convoy S8 SST40

Compatible batteries — unprotected 18650

flashlights.parametrek.com says it does 600 lumens, with a 20° beam angle.

flashlight — Convoy M21C SST40

Compatible batteries — 21700

flashlights.parametrek.com says it does 780 lumens normally, with a turbo up to 2000 lumens (but the battery + heat dissipation only allows it to run for 9 minutes), with a 9° beam angle.

flashlight — UltraFire WF-501B

Compatible batteries — 18650

flashlight — GearLight S1050

Compatible batteries — 18650, or 3x AAA

batteries owned

18650 x8

21700 x1