Charging battery USB Fenix 18650 3500mAh (Li-ion)

Fenix 18650 3500 mAh rechargeable battery (L18-3500U) with its own micro-USB charging connector. It can be charged by connecting the cable to the micro-USB connector (e.g. from a computer or mobile phone charger) or in a conventional charger. Li-ion rechargeable batteries are characterized by very high capacity, do not suffer from memory effect or self-discharge. Li-ion in the 18650 size are the best choice in terms of stored energy due to the size and weight of the battery.

Fenix battery protection consists of internal safety mechanisms and protective electronics. Added electronic circuits prevent the cell from overcharging, over-discharging and against short circuit or over-current draw. If the battery electronics assess that the limits have been reached, they safely disconnect the cell.

Internal protection consists of a separator, PTC thermal protection and a special explosion-proof valve. In the event that the gas pressure in the cell exceeds a certain limit, the internal separator separates the electrodes inside the battery and thus de-facto interrupts the exothermic reaction and the explosion-proof valve releases the excess gas pressure outside the battery. The combination of electronic and mechanical (temperature and pressure) protection makes Fenix batteries one of the safest Li-ion batteries available.

The 18650 battery is roughly equivalent in size to two CR123A lithium batteries, which is why it is often used in flashlights as a rechargeable alternative to these primary cells. Please check first whether your appliance supports this cell. This battery is designed for use in Fenix E28R, E30R, Fenix E35 UE (not designed for E35 V3.0), PD32 V2.0, PD35, TK11 TAC, TK15, TK16 (1000 lm version only), TK25 UV, TK25 IR, TK25 Red, TK25 R&B, TK26R, TK75, FD41, LD30, SD11, SD20 LED flashlights. LED headlamps Fenix HL55, HL60R, HP25R (1000lm version only), HP30R (1750lm version only), HM60R, HM61R, HM65R, HM65R-T, lanterns CL26R, CL30R and bike lights Fenix BC21R and BC30.

Please note, due to length and diameter may not fit some old models - for example Fenix PD31, PD32 XP-G2, TK11, TK21, TK30.

Caution, due to the length of 70mm and diameter it may not fit some old models - for example Fenix PD31, TK11, TK21, TK30, Zebralight, Solarforce. The battery is also not compatible with Fenix FD65 and Fenix TK47 models.

Parameters of USB battery Fenix 18650 3500mAh:

• Nominal voltage : 3.6 V
• Capacity : 3500 mAh, tested at 0.2C discharge current with termination at 2.5V and 25°C
• Maximum current draw : 2C (7 A)
• Maximum charging current : 2 A, charging current of built-in micro-USB input : 0.8A.
• Dimensions: 18.6 mm (diameter) x 70 mm (length) (+/- 0.5 mm)
• Weight 50.2 grams
• Protection against overcharging, complete discharge and short circuit (>7 A).
• Lifetime of more than 500 charge cycles
• Recommended operating temperatures: 0-45°C (charging), -20 to +60°C (discharging)
• Scope of delivery: one Fenix 18650 3500mAh USB battery (ARB-L18-3500U).
• USB cable is not included, but can be purchased separately.
• The datasheet of the used cell directly from the manufacturer can be downloaded here.

Charging via micro-USB connector:

Plug the USB cable into the side micro-USB connector, during charging the indicator light on the top of the battery glows red. When full charge is reached, it glows blue or green.

Warning:

If you are using an older charger purchased approx. before 2014, please check first whether it can accommodate batteries with a length of 69-70 mm.
If possible, do not discharge the battery below 2.5 V
Do not short-circuit the battery (do not connect the cell poles with a wire)
Do not throw the battery into fire or water
Never insert the battery into the charger in reverse (opposite polarities)
When using the battery, observe the safety principles
Use only an adequate charger that supports Li-ion batteries

Type: Rechargeable Li-ion
Capacity: 3500 mAh
Size: 18650
Weight: 50 g