ENERpower Softpack 36V 10S4P 20Ah BMS Pedelec Battery (10×4) DIY M50 21700 in Roswheel bag

335.00 Inc. 19% Vat.

ENERpower Softpack battery 36V 20Ah for Pedelecs, eBikes DIY with LG Chem INR21700 M50

Important General Information

The 36V batteries in softpack, which we manufacture in Berlin, have 2 versions square and rectangular. The batteries are manufactured in plastic cell brackets. Charging is done with a high-quality spiral cable (20 cm – 100 cm) with an XLR-3 PINS, discharging via a discharge cable with XT90 connector (male). A fuse of 30A in a water-resistant holder limits the current drain.

In this rectangular version, 10 cells are used as the longest side (220 mm). We manufacture this type of battery in the formats 10S3P (construction 10×3), 10S4P (construction 10×4), 10S5P (construction 10×5) and 10S6P (construction 10×6).

The Battery Management System (BMS) is always mounted on the longest side of the battery. At this side the battery is approx. 10 -15 mm thicker.

We manufacture the Softpack batteries with FR4 insulation, flame retardant composites made of epoxy resin and glass fabrics. FR-4 is used, among other things, as an electrically non-conductive carrier material for electrical circuit boards.

In this battery we have an LED charge status display (empty/25%/50%/75%/full). This is located on the upper side of the battery

Compatible with engines:

250 watts / 500 watts / 750 watts



  • High-quality manufacturing – made in Germany
  • Assembly just-in-time
  • BMS with an integrated passive balancer
  • BMS with protection against overcharge, deep discharge, over-discharge (temperature monitoring)
  • LG Chem INR21700 50M
  • directly from the manufacturer
  • Rechargeable – After 300 charging cycles maintains 80% of the original capacity
  • No memory effect – charge the battery whenever you want
  • Weight: approx. 3 Kg.
  • Environmentally friendly according to EU Directive 2002/95/EC (RoHS)

Technical data

  • Li-Ion-cell: LG Chem INR21700 M50
  • Voltage (nominal): 36V (37V)
  • Capacity: 20 Ah
  • Power: approx. 730 Wh
  • Configuration: 10S4P
  • Set up: 10 x 4
  • Internal resistance: < 75 mOhm
  • Charge Voltage: 42V
  • End-of-Discharge Voltage: 30V
  • Maximum Charging current: 5A
  • Continuous Discharge Current: 20A = 720 watts
  • 10 Min. Discharge current: 25A = 900 Watts
  • 5 Seconds Discharge Current: 35A = 1260 Watts
  • Continuous load per cell: approx. 3.7A or approx. 7A in peak load


  • 220 mm in length
  • 88 mm – 98 mm in width
  • 75 mm in height