Li-Ion battery 18650 3.7V 2500mAh for Leifheit window cleaners (JST-VH-2P)

Product detailed description

Replacement Li-Ion battery with an 18650 cell in 1S1P configuration, designed for Leifheit cordless window cleaners and compatible devices. The battery is equipped with a wiring harness and a JST-VH-2P connector, allowing you to replace the original depleted cell without the need for soldering into the device. The 2500 mAh capacity is higher than that of most original cells (1700–2000 mAh), which extends the cleaning time per single charge. The battery does not include protection electronics (PCB) – it relies on the protection circuits within the device itself, or on your own charging and protection module.

Specifications:

• Cell Type: Li-Ion 18650, 1S1P configuration (1 cell)
• Nominal Voltage: 3.7 V
• Fully Charged Cell Voltage: 4.2 V
• Discharged Cell Voltage (cut-off): 2.75 V
• Capacity: 2500 mAh (approx. 9.25 Wh)
• Continuous Discharge Current: 8C (approx. 20 A)
• Peak Discharge Current: 10C (approx. 25 A)
• Recommended Charging Current: 0.5C (approx. 1.25 A), CC/CV method up to 4.2 V
• Protection Electronics (PCB/BMS): None
• Connector: JST-VH-2P
• Leads: 2× wires (+ and –), length 50 mm, 20 AWG cross-section
• Dimensions:
  • Cell: Ø 18 × 65 mm
  • Total Length with Wires and Connector: approx. 120 mm
• Weight: approx. 48 g
• Operating Temperature: discharge –20 °C to +60 °C, charging 0 °C to +45 °C
• Lifespan: approx. 300–500 charging cycles
• Compatibility (Leifheit window cleaners):
  • Leifheit 51113, 51114, 51147
  • Leifheit Window Dry&Clean 51003
  • Leifheit 5100, 51019
  • SILVERCREST SFR 3.7 D3
• Replacement for original cells: 1700 mAh, 1800 mAh, 2000 mAh (types BEN / BFN Li-ion 18650, 205050, 205513, 1S1PL1865-2.0)

Package contents:

• 1× Li-Ion 18650 battery 3.7V 2500mAh with wires and JST-VH-2P connector

Important Notice and Safety:

• The battery does not contain protective circuitry (PCB). Use it only in devices that have their own protection against overcharging, deep discharge, short circuits, and excessive current.
• The user is solely responsible for the correct connection, charging, and use of the battery. Check the polarity of the wires before connection.
• Charge only with a charger designed for 1S Li-Ion cells using the CC/CV method and a maximum charging voltage of 4.2 V. Never exceed this voltage.
• Do not short-circuit, disassemble, puncture, or mechanically damage the cell.
• Do not charge unattended, on a flammable surface, or near flammable materials.
• Do not expose the battery to high temperatures, open flames, direct sunlight, or moisture.
• Do not discharge the cell below 2.75 V – deep discharge irreversibly reduces capacity and lifespan.
• Stop using the battery immediately if you notice swelling, deformation, odour, electrolyte leakage, or excessive heating.
• Keep out of reach of children. For long-term storage, charge the cell to approx. 3.7–3.8 V and store in a cool place.
• Do not dispose of discharged cells in normal household waste – insulate the contacts before disposal and take them to a battery collection point.

Note:

• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change its basic properties.