Editorial guide
Find a replacement battery by exact light model
Match the model and generation first, then read the named battery, permitted alternatives and exclusions together.
A model-first replacement battery lookup for six exact flashlight and headlamp records.
Start with the exact model and generation
Match the full model name, generation and listed configuration before choosing a replacement battery. Cell size alone does not prove fit.
The table keeps each battery statement with the exact light record that supports it. A battery family shared by two lights is still a separate fit question for each model.
Named battery versus family-only record
Some records name a battery product, such as Streamlight 66607 or Fenix ARB-L16-800P. The Wurkkos FC11C record supports an 18650 Li-ion family and both top styles, but no exact replacement-cell retail package is established.
Exact products are linked when the model record supports them. A family-only record stays at the documented family rather than becoming a specific package claim.
Read alternatives and exclusions together
An alternative belongs only to the model that documents it. Fenix E18R V2.0 permits CR123A as a non-rechargeable alternative and prohibits LiFePO4 16340, while HM53R documents 16340 or CR123A as backup options.
A permitted family is not permission to substitute every package in that family. The E28R V2.0 row keeps its included ARB-L18-3400 identity without extending the statement to other 18650 products.
Separate charging from battery identity
USB-C or micro-USB on the light describes where charging occurs. Battery identity, alternatives and exclusions remain separate fields in the same model record.
Streamlight documents battery replacement through the MicroStream USB tailcap while charging remains micro-USB on the light. The covered Wurkkos and Fenix models keep their on-light charging notes beside their battery records.
Exact model and generation
Documented primary battery
Alternatives and exclusions
Exact product and package check
| Exact light | Documented primary battery | Permitted alternatives / exclusions | Charging / replacement notes | Exact sources |
|---|---|---|---|---|
| Streamlight MicroStream USB, black 66601 | Streamlight 66607 rechargeable Li-ion. | No additional alternative is asserted in this record. | Replace through the tailcap; charging remains micro-USB on the light. | Streamlight MicroStream USB product recordStreamlight MicroStream USB instructions |
| Wurkkos FC11C, 5000K | One 18650 Li-ion; family-only record. | Flat-top and button-top supported; 2.7–4.2V operating record. No exact replacement-cell retail package is established. | USB-C on the light. | Wurkkos FC11C product recordWurkkos FC11C manual |
| Fenix E18R V2.0 | ARB-L16-800P recommended; ARB-L16 series usable. | CR123A is permitted but non-rechargeable in the light; LiFePO4 16340 is prohibited. | USB-C on the light. | Fenix E18R V2.0 product recordFenix E18R V2.0 manual |
| Fenix HM50R V2.0 | Included ARB-L16-800P. | No additional alternative is asserted in this bounded record. | USB-C on the lamp. | Fenix HM50R V2.0 product recordFenix HM50R V2.0 manual |
| Fenix HM53R | Included ARB-L18-1600. | 16340 or CR123A documented as backup for this exact model. | USB-C on the lamp. | Fenix HM53R product recordFenix HM53R manual |
| Fenix E28R V2.0 | Included ARB-L18-3400 18650. | No other 18650 product or package is inferred. | USB-C on the light. | Fenix E28R V2.0 product recordFenix E28R V2.0 manual |
Source notes
Manufacturer and standards sources for the facts on this page.
- Streamlight MicroStream USB product record
- Streamlight MicroStream USB instructions
- Wurkkos FC11C product record
- Wurkkos FC11C manual
- Fenix E18R V2.0 product record
- Fenix E18R V2.0 manual
- Fenix HM50R V2.0 product record
- Fenix HM50R V2.0 manual
- Fenix HM53R product record
- Fenix HM53R manual
- Fenix E28R V2.0 product record
- Fenix E28R V2.0 manual