The battery is the “heart” of an electric vehicle and the first line of safety. Many e-bike riders often wonder: How long should I use my battery before replacing it? Is it dangerous not to replace it?
Cane Energy, as a professional manufacturer of lead-acid batteries, always prioritizes safety and compliance to produce batteries that customers can trust. Today, we will explain in the simplest terms when a lead-acid battery should be replaced.
1. How long does a lead-acid battery normally last?
Most two-wheeled electric vehicles on the market use lead-acid batteries. The material properties of lead-acid batteries determine their normal degradation pattern. Under normal use and proper charging:
- Daily commuting and home use: 2–3 years
- Food delivery or high-frequency use: 1–2 years
- Well-maintained and properly charged: up to 3 years or more
2. Replace the battery immediately if these 4 conditions occur
No matter how long you have used the battery, if any of the following situations occur, do not continue using it—replace it immediately:
1. Range significantly reduced to less than half of the original.
A new battery can travel 40 km on a full charge, but now it only goes 15–20 km or less. Or, when you twist the throttle, the power drops by one bar but recovers when stopped. Or, the battery charges quickly but drains immediately when riding. These are typical signs of plate aging and severe capacity loss, indicating it is time for replacement. Visit a professional shop to replace it promptly to avoid damaging other components.
2. Abnormal charging time and severe heating.
The charger turns green after only 1–2 hours, indicating the battery cannot accept a full charge. The battery becomes noticeably hot or even scalding during charging. The charger never switches to green and emits a burnt smell. These conditions cause overheating, leading to bulging, leakage, short circuits, and the battery should not be used.
3. Battery bulging, deformation, or leakage.
This is the most dangerous sign! If the battery casing bulges, deforms, shows crystals or leakage at the bottom, or cracks, stop using it immediately and replace it. Continuing use poses a serious safety risk.
4. Poor performance in winter that does not recover in summer.
As mentioned in previous articles, it is normal for e-bike batteries to perform poorly in winter. However, if the range remains poor even when temperatures rise in summer, or charging and discharging are noticeably worse than before, the battery has permanently aged. It is not a temperature issue—it is time to replace it.
3. Avoid these common misconceptions
1. “It still runs, so I don’t need to replace it.” An aged lead-acid battery not only has poor range but can also damage the motor and controller, and pose safety risks.
2. “Adding distilled water can revive it.” This only works for a very few batteries that are not severely aged. For batteries with severe degradation or bulging, adding water is ineffective and may even be dangerous.
3. “If the warranty hasn’t expired, I don’t need to replace it.” The warranty is a service guarantee, not a usage limit. If the battery is clearly failing, replace it promptly to avoid running out of power mid-ride.
4. Manufacturer’s recommendations
- Do not ride until the battery is completely dead; charge it as you use it.
- Do not use non-brand chargers; always use the original matching model.
- Charge in a cool, ventilated area; avoid charging in direct sunlight or rain.
- If not riding for a long time, recharge at least once a month.
- If you notice a sudden drop in range, visit a shop for inspection—do not push it.
5. Summary
For e-bikes primarily using lead-acid batteries:
- Normal home use: replace every 2–3 years.
- High-frequency use: replace every 1–2 years.
- If range is halved, charging heats up, or battery bulges or deforms: replace immediately.
Cane Energy has always prioritized product safety, with standardized production processes and multiple quality checks. Choose Cane Energy for greater peace of mind, confidence, and assurance!
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