We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular lithium battery, silver finish, 34.1 by 34.0 by 4.1mm

Estry

Estry PD3555w 3.7V 300mAh standard battery

SKU CH-JQQE-0X5XJ MPN PD3555w

Replacement 3.7V 300mAh lithium battery for PD3555w, Fenix 2 and Fenix 1 devices

  • Battery typeLithium
  • Battery capacity300 mAh
  • Battery voltage rating3.7
  • Product typeRechargeable Batteries
  • Replaces original battery in Fenix 1 and Fenix 2
  • Built to original 3.7V 300mAh specification for reliable power
  • Overcharge and short-circuit protection extends usable life
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS
  • Compact 34.1 x 34.0 x 4.1 mm design weighs 32.8 g

Direct replacement for Fenix 1 and Fenix 2

The Estry PD3555w is a 3.7V 300mAh lithium rechargeable cell built to match the original specifications for Fenix 1 and Fenix 2 devices. It fits the 361-00061-00 part number and carries ISO9001, RoHS, CE, UN38.3 and MSDS certification.

Capacity and headroom for daily tracking

At 1.11Wh the pack powers typical fitness-tracking workloads through a full day of GPS logging and sensor polling. Heavy backlight use or continuous navigation will drain the cell faster, requiring a mid-day top-up for uninterrupted recording.

Single-cell lithium limits and safety

The 3.7V chemistry delivers its rated capacity only within the designed voltage window; overcharge, over-discharge and short-circuit protection circuits prevent damage but also cap peak current. The 34.1 x 34.0 x 4.1mm footprint leaves no room for higher-capacity cells without a device redesign.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $14.99
Pricier than about 67% of the 10,440 comparable items (median $10.99).

Specifications

Product
Product typeRechargeable Batteries
Power
Battery typeLithium
Battery capacity300 mAh
Battery voltage rating3.7

Questions about this item

Will this 3.7V 300mAh replacement fit my Fenix 2 that originally used the 361-00061-00 pack?

Yes, the PD3555w is listed as compatible with Fenix 2, Fenix 1 and the 361-00061-00 part number.

How can I confirm the battery is functioning correctly once installed?

The device should power on and hold charge; the pack includes overcharge, over-discharge, over-voltage and short-circuit protection for safe operation.

What comes in the box and do I need any extra parts?

The replacement battery itself is supplied; no additional cables, chargers or tools are included.

More in Household Batteries & Chargers

Similar items