products I own, 3.7V Li-ion-related

Nitecore UMS4 — battery charger

[manual]

Batteries compatible with:

• IMR (lithium ion manganese), Li-ion, and LiFePO4 — 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
• Ni-MH and Ni-Cd — AA, AAA, AAAA, C, D

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