Water Bottle Style Mini / Universal Battery

Design Type

One-piece injection‑molded water‑bottle shaped casing with round or oval cross‑section. Approx. dimensions: height 32–36cm × diameter 7.5cm, weight approx. 2.6–2.9kg. Mainly features 36V / 7Ah–10.5Ah lithium-ion combination. Snaps directly into a standard water bottle cage via an adapter mount; installation/removal takes less than 10 seconds. Usually includes a waterproof charging port and mechanical lock.

Performance Parameters

Higher‑end models use high‑rate 18650 cells, with selectable nominal voltage (three options). The BMS provides efficient balanced charge/discharge management. Supports continuous discharge current up to 20A–25A, compatible with folding bike motors and small‑wheel motors in the 200–550W power range. Cycle life up to ≥800 deep charge/discharge cycles. Some models also support reverse USB power output for charging phones, GPS units, lights, and other external devices.

Advantages

Key selling points: compact, lightweight, plug‑and‑play, and easily replaceable. Offers the highest maintainability for short‑distance commuting, light urban travel on folding e‑bikes, and commuter bikes. Also a very popular universal choice among DIY enthusiasts.

Application Scenarios

Particularly suitable for upgrading older complete bikes to electric assist, as well as for folding e‑bikes and small‑wheel commuter bikes.