Nepal's e-rickshaw fleet has grown significantly across the Eastern Terai — Biratnagar, Itahari, Dharan, Inaruwa, and surrounding areas. For operators, the battery is not just a component; it is the business. A healthy battery bank means full shifts and reliable income. A failing bank means downtime, repair costs, and lost fares.
Kulayan Battery Industries has been manufacturing e-rickshaw batteries in Biratnagar since the 2010s. This guide reflects what we have learned from thousands of battery cycles and direct feedback from operators across Eastern Nepal.
Which battery type is right for an e-rickshaw in Nepal?
Most e-rickshaws in Nepal run on a bank of lead-acid tubular batteries, typically four to six units connected in series to achieve 48V or 60V. Two technologies are common:
| Feature | Tubular Lead-Acid | Lithium-Ion (Li-Ion) |
|---|---|---|
| Upfront cost | Lower (NRs 15,000–25,000 per unit) | Higher (3–5× more) |
| Cycle life | 300–500 cycles | 1,000–2,000+ cycles |
| Weight | Heavy (~30 kg per unit) | Light (50–70% lighter) |
| Charge time | 8–10 hours | 2–4 hours |
| Maintenance | Requires water topping | Maintenance-free |
| Availability in Nepal | Widely available, local service | Limited service centres |
For most operators in Eastern Nepal today, tubular lead-acid remains the practical choice — because of lower upfront cost, wide availability of replacement units, and local service support. Kulayan's lithium-ion line is under development and will be available soon for operators ready to make the upgrade.
Key specifications to look for
When buying an e-rickshaw battery, check these specifications before anything else:
- Voltage: Most e-rickshaws require a 48V system (four 12V batteries) or 60V (five 12V batteries). Match exactly to your vehicle's motor controller specification.
- Capacity (Ah): Higher Ah = longer range per charge. Standard e-rickshaw banks use 100Ah–140Ah units. A 120Ah bank at 48V gives approximately 60–80 km on flat terrain in the Terai.
- Tubular plate design: Tubular positive plates handle deep discharges far better than flat-plate designs — critical for vehicles that are fully discharged and recharged daily.
- Warranty: Reputable manufacturers provide minimum 1-year warranty. Kulayan provides a full 1-year warranty on all e-mobility batteries.
How to extend your e-rickshaw battery's life
Battery lifespan is determined as much by how you use and maintain it as by the quality of the battery itself. These five habits will measurably extend your battery's life:
1. Never let the battery fully discharge
Deep discharge below 20% capacity shortens battery life significantly. Most modern e-rickshaw controllers have a low-voltage cutoff — respect it. Do not push the vehicle when the controller is warning you to stop.
2. Charge every night, regardless of distance run
Lead-acid batteries should not be left in a partially discharged state. Even if you ran only half a shift, plug in each night. Sulfation — the crystal buildup that kills batteries — accelerates when batteries sit discharged.
3. Check water levels monthly
Flooded tubular batteries require distilled water topping every 4–6 weeks. Low electrolyte levels expose the plates and causes permanent damage. Use only distilled water — never tap water or battery acid.
4. Keep terminals clean and tight
Corrosion on battery terminals increases resistance and reduces power delivery. Clean terminals with a bicarbonate solution and a wire brush every three months. Tighten all connections — loose terminals cause arcing and heat damage.
5. Charge with a proper charger at the correct rate
Never use a charger with a higher current rating than specified for your battery. For a 120Ah battery, charge at 10–15A maximum. Fast charging with oversized chargers causes excessive heat and degrades plate integrity.
Biratnagar operator tip: The Terai's summer heat (40°C+) accelerates water loss and plate corrosion. During Jestha and Ashadh (May–July), check water levels every two weeks rather than monthly — and avoid charging in direct afternoon sun.
When is it time to replace?
A battery bank that was giving 70 km of range and now gives 35–40 km has lost roughly half its capacity — replacement is due. Other signs include:
- Battery taking longer than usual to charge
- One or more cells running hot during charging
- Visible swelling or deformation of battery cases
- Electrolyte turning dark brown or black (plate material shedding)
Why buy locally from Biratnagar?
Kulayan Battery Industries manufactures e-rickshaw batteries at our Khanar-6, Sunsari facility, with our head office at Biratnagar-11. Buying locally means:
- Faster warranty service — no shipping to Kathmandu, no weeks of waiting
- Batteries built for Nepal's climate — validated for Terai heat, monsoon humidity, and voltage fluctuations from NEA grid instability
- 50+ authorised dealers across Eastern Nepal who can test, service, and replace your battery bank
- ISO 9001 quality — every unit manufactured and tested to international standards
Need an e-rickshaw battery in Eastern Nepal?
Contact our Biratnagar head office or find your nearest Kulayan dealer. We'll help you choose the right battery for your vehicle and budget.
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