• Razor (USA): Razor, a popular brand for entry-level electric scooters, has offered some models that use NiMH batteries. These scooters are often designed for younger riders or those looking for an affordable option. The Razor E100 and other similar models have been known to use NiMH batteries, providing a reliable but lower-range option for casual use.

• Xiaomi (China): While Xiaomi’s more recent models (like the Mi M365 series) typically use lithium-ion batteries, earlier models or some budget variants used NiMH technology. These models targeted more casual riders or new users who might not need high performance but still wanted an affordable electric scooter.

• GoTrax (USA): GoTrax offers affordable electric scooters aimed at commuters and casual riders. Some of their lower-end models use NiMH batteries, as they are cost-effective and provide sufficient power for short-distance travel. These scooters typically feature smaller motors and shorter ranges, making them a great option for riders looking for something simple and inexpensive.

Ni-MH, 12V, 2000mAh Rechargeable Battery Compatible with Robomow MRK5002

36V 7800mah Rechargeable Lithium Battery Pack Compatible with M365 Electric Scooter

The specifications of NiMH (Nickel-Metal Hydride) batteries used in electric scooters vary depending on the scooter’s motor power, design, and intended use. However, the following are typical specifications for NiMH batteries commonly used in electric scooters:

1. Battery Type and Chemistry

• Chemistry: Nickel-Metal Hydride (NiMH)
• Voltage: Typically ranges from 6V to 48V, depending on the scooter model and motor size.
  • Entry-level scooters: 6V, 12V, or 24V
  • Mid-range scooters: 36V
  • High-power scooters: 48V

2. Capacity (Ah or mAh)

• Capacity: Measured in Ampere-hours (Ah) or Milliampere-hours (mAh).
  • Typical capacities range from 2Ah to 20Ah for NiMH batteries used in scooters.
  • Entry-level scooters might have capacities between 2Ah to 6Ah, providing shorter ranges (10-15 miles).
  • Mid-range scooters can have capacities between 6Ah to 12Ah, offering ranges around 15-25 miles.
  • High-power scooters with larger motors can have capacities between 12Ah to 20Ah for extended ranges of up to 30 miles or more.

3. Energy Density

• NiMH batteries typically have an energy density of about 60-120 Wh/kg (watt-hours per kilogram).
• This is lower than lithium-ion batteries (which typically range from 150-250 Wh/kg), meaning NiMH batteries are heavier for the same energy storage.

4. Weight

• NiMH batteries used in electric scooters are heavier compared to lithium-ion batteries due to their lower energy density.
• The weight can vary greatly depending on the battery size, but typical NiMH packs for electric scooters may weigh between 2kg to 5kg for medium-sized batteries (e.g., 6-12Ah capacity).

5. Charge/Discharge Cycles

• Cycle Life: NiMH batteries typically offer about 500-1,000 charge-discharge cycles before capacity begins to degrade noticeably.
  • This is lower than lithium-ion batteries, which can last up to 1,500-2,000 cycles.
• Self-Discharge Rate: NiMH batteries typically have a higher self-discharge rate than lithium-ion, losing around 20-30% of their charge per month when not in use, though low-self-discharge NiMH (LSD NiMH) batteries can reduce this effect.

6. Charging Time

• Charging Time: NiMH batteries typically take 4-8 hours to fully charge, depending on the charger and battery capacity.
  • Entry-level scooters with smaller capacities may charge faster, while higher-capacity batteries may take longer.

7. Discharge Rate

• NiMH batteries have a moderate discharge rate and can deliver continuous discharge rates of 0.5C to 2C (where C is the battery capacity in Ah). This means:
  • A 6Ah NiMH battery could safely discharge at a rate of 3A to 12A.
  • This is sufficient for most scooter motors in the 250W to 500W range.
  • High-powered scooters (motor >500W) would generally benefit from lithium-ion batteries, which can support higher continuous discharge rates.

8. Operating Temperature Range

• NiMH batteries are generally less sensitive to temperature extremes compared to lithium-ion, though they still perform best at 10°C to 30°C (50°F to 86°F).
• Cold Temperature Performance: NiMH batteries may lose some capacity in cold temperatures (below 0°C or 32°F), but they generally perform better in colder conditions than lithium-ion batteries.

Applications of NiMH Batteries in Scooters

Electric scooters, whether designed for commuting, recreational use, or last-mile delivery, typically rely on rechargeable batteries as their primary power source. NiMH batteries have been used in scooters, especially in the early stages of electric scooter development, due to several key attributes:

• Entry-Level Electric Scooters: NiMH batteries were once the go-to option for budget electric scooters. These scooters, often aimed at casual riders or first-time buyers, benefit from the relatively lower upfront cost of NiMH technology compared to more expensive alternatives like Li-ion.

• Hybrid Power Systems: Some hybrid models that combine both electric and manual propulsion may incorporate NiMH batteries to power the electric motor, while still relying on pedal or foot action as a backup or assistive power source.

• Low to Medium Power Systems: NiMH batteries are typically used in scooters with lower power needs, such as those with motors rated around 250W to 500W. These models typically have shorter ranges (around 10-20 miles) compared to more powerful scooters with Li-ion batteries.

Advantages of NiMH Batteries in Scooters

While lithium-ion batteries have mostly taken over the electric scooter market, there are still specific situations where NiMH batteries may be chosen:

• Cost-Effective: NiMH batteries are typically less expensive to produce than lithium-ion batteries. This makes them attractive for budget scooters, which may appeal to price-sensitive consumers.

• Environmental Benefits: NiMH batteries are considered more environmentally friendly than some other options, particularly the older Nickel-Cadmium (NiCd) batteries, as they contain fewer toxic materials and can be recycled more easily.

• Safety: NiMH batteries are generally safer than lithium-ion batteries in terms of their lower risk of overheating or catching fire. While both battery types can be dangerous under extreme conditions, NiMH batteries tend to have a better safety record when it comes to long-term use.

• Durability and Reliability: NiMH batteries tend to perform better in colder temperatures compared to lithium-ion batteries, which can lose efficiency when exposed to extreme cold. This could be a plus for scooters used in regions with cooler climates.

• Stable Discharge Rate: NiMH batteries provide a more consistent discharge rate compared to some older technologies, offering steady power output throughout the ride, which can be beneficial for maintaining scooter performance.