The most important part of an electric bike isn’t the motor or the controller—
it’s the battery.

Your battery determines range, safety, power output, lifespan, weight, and even the riding experience.
But with so many options—48V, 52V, 36V, Hailong, rear rack, down-tube, NCM, LiFePO4—many buyers are unsure how to choose the correct one.

This guide will help you quickly and confidently choose the best battery for your e-bike with low risk and maximum compatibility.

1. Confirm Your Motor & Controller Specs (Most Important)

A battery is not “the bigger the better.”
It must match your motor and controller.

✔ 1. Voltage

Common voltage options:

• 36V – For small motors (250W–350W)

• 48V – Most popular for 500W–1000W bikes

• 52V – Performance version compatible with some 48V controllers

• 60V+ – High-power electric motorcycles

If the voltage doesn’t match:

• Lower voltage → weak power or won’t start

• Higher voltage → controller protection, alarm, or damage

➡ Always choose the same voltage as your original battery.

2. Choose Capacity (Ah) Based on Your Riding Range

Capacity determines how far you can ride on one charge.

 Common Capacity Reference

• 10Ah–13Ah: Short commuting (20–35km / 12–20 miles)

• 15Ah–17.5Ah: Medium-distance (40–55km / 25–35 miles)

• 20Ah+: Long range (60–100km / 37–62 miles)

Recommended Capacity by Usage

3. Choose Battery Chemistry: NCM vs LiFePO4

✔ NCM (Lithium-ion / Ternary)

Pros:

• Higher energy density (lighter, smaller)

• Better range

• More power output

Cons:

• Shorter cycle life than LiFePO4
  Best for:
  E-bikes, mountain bikes, commuting, long range

✔ LiFePO4 (Lithium Iron Phosphate)

Pros:

• Highest safety

• Extremely long cycle life
  Cons:

• Heavier and larger
  Best for:
  Delivery bikes, cargo bikes, tricycles, long-life applications

➡ For lightweight and long range → Choose NCM
➡ For maximum safety and long lifespan → Choose LiFePO4

4. Choose the Correct Battery Case Type

Each bike model uses different battery housings. Common types:

✔ Hailong Battery (Most universal)

• Mounted on the downtube

• Popular for 13Ah–20Ah packs

• Fits most DIY or aftermarket builds

✔ Rear Rack Battery

• Used on city/commuter bikes

• Larger capacity

• Good for riders who don't remove the battery often

✔ Down Tube / Integrated Battery

• Built into the frame

• Requires exact size matching

✔ Triangle Battery Pack

• Extra-large capacity

• Ideal for off-road or high-power builds

➡ Always confirm dimensions to make sure the battery fits your frame.

5. Choose High-Quality Cell Brands

The core of any battery is the cell quality.

Top battery cell brands include:

Premium Imported Cells

• Samsung

• LG

• Panasonic

Top Chinese Brands

• EVE

• Lishen

• BAK

Avoid batteries with unbranded or unspecified cells.

6. Check the BMS (Battery Management System)

The BMS controls charging, discharging, balance, and safety.

Important BMS functions:

• Overcharge protection

• Over-discharge protection

• Overcurrent protection

• Cell balancing

BMS Current Recommendations:

• 350W–500W motor → 15A–20A BMS

• 750W motor → 20A–25A BMS

• 1000W motor → 30A BMS

• High-power off-road → 40A+

If the BMS current is too low, the bike will lose power or cut off during acceleration.

7. Certifications, Safety & After-Sales Support

A good battery should have the proper certifications:

✔ Required Safety Certifications

• UN38.3

• MSDS

• CE / RoHS

• IEC62133

• UL (for North America)

✔ What Reliable Suppliers Should Provide

• At least 12 months warranty

• Fast after-sales support

• Customization options for B2B buyers

• Stable cells and low failure rate across bulk orders

B2B buyers care most about:
✔ Batch consistency
✔ Low defect/return rate
✔ Transport safety
✔ Cycle life

B2C buyers care most about:
✔ Range
✔ Safety
✔ Compatibility
✔ Weight
✔ Brand

8. Quick Summary: How to Choose the Right Battery (60-Second Formula)

✔ 1. Match the voltage with your original battery

Voltage cannot be changed casually.

✔ 2. Select capacity based on your daily mileage

More Ah = more range.

✔ 3. Choose reliable cells (EVE / Samsung / LG / Panasonic)

✔ 4. Ensure the BMS current matches your motor power

✔ 5. Check battery case type & dimensions

Hailong / Rear Rack / Triangle / Integrated

✔ 6. Confirm certifications and warranty