Tag: Lead-Acid Batteries

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!

As temperatures rise, electric vehicles (EVs) remain a key mode of daily transport, and their core component—the battery—draws significant attention regarding safety and lifespan. Many people wonder: Are EV batteries afraid of direct sunlight? How should they be maintained in hot weather? As a professional battery R&D and manufacturing company, we provide detailed answers from technical principles and usage scenarios.

1. EV Batteries Are Indeed Vulnerable to Direct Sunlight

EV batteries are highly susceptible to direct sunlight. Most EV batteries are lead-acid batteries, and high temperatures are a critical factor affecting their performance, lifespan, and safety.

1.1 High Temperatures Accelerate Battery Aging, Reducing Range

Batteries consist of chemical materials. High temperatures intensify internal chemical reactions, accelerating the degradation of active materials. Prolonged exposure to sunlight causes a continuous decline in battery capacity, leading to issues like “inability to charge fully and reduced range,” directly shortening the overall battery lifespan.

1.2 Causes Battery Bulging and Deformation, Posing Safety Hazards

Direct sunlight rapidly raises the internal temperature of the battery, increasing internal pressure. This can lead to battery casing bulging and deformation, and in severe cases, may cause wiring aging and insulation degradation, posing safety risks.

1.3 Increases Charging Risks, Making High-Temperature Charging More Dangerous

After exposure to sunlight, the battery itself is at an elevated temperature. Charging immediately under such conditions creates a combined effect of “high temperature plus charging heat,” causing the battery and charger to overheat. This not only damages the battery but also poses safety hazards.

2. Battery Protection Tips for Hot Weather

Proper daily maintenance can extend battery life and ensure riding safety. These simple and practical tips are easy for everyone to follow.

2.1 Avoid Prolonged Sun Exposure, Choose Parking Wisely

Park your EV in shaded, well-ventilated areas without direct sunlight, such as garages, under trees, or in covered parking lots. If parking outdoors for extended periods, use a sunshade or cover to reduce direct sunlight. Avoid parking in direct sunlight during midday heat.

2.2 Let the Battery Cool Before Charging

After exposure to sunlight or long rides, allow the battery to cool naturally for at least 30 minutes before charging. Do not charge in direct sunlight or in enclosed, high-temperature environments.

2.3 Charge Scientifically: Avoid Overcharging and Deep Discharge

Use the original charger and avoid mixing with inferior or incompatible chargers. Disconnect the power promptly after full charge to avoid prolonged “trickle charging.” Aim for shallow discharges and charges; do not wait until the battery is completely drained before charging.

2.4 Avoid Long Rides in High Temperatures

During hot summer periods, minimize continuous long rides. Take breaks to allow the battery and motor to cool down. Avoid frequent rapid acceleration and hard braking to reduce battery load.

2.5 Regular Inspections and Timely Handling of Abnormalities

Regularly check the battery for bulging, leakage, deformation, or loose connections. If you notice issues like overheating during charging, sudden range drop, or abnormal charging time, visit a professional service center for inspection.

3. Peace of Mind for Worry-Free Travel

As a professional battery company, we adhere to the principles of safety first and quality foremost. From raw materials and production processes to product testing, we strictly control every step to create battery products that are heat-resistant, more stable, and longer-lasting.

We also remind users: proper use and scientific maintenance are key to extending EV battery life and ensuring travel safety. High temperatures are not a concern as long as you take protective measures. This will keep your battery in good condition, accompanying you on longer and safer journeys.

Many electric bike riders notice that in winter, the same bike and the same route that could go far in summer now drains power quickly, sometimes running out halfway. Many people’s first reaction is ‘the battery is broken’ and they rush to buy a new one, but in most cases, the battery is not damaged. In fact, the reduced range of electric bikes in winter is mainly caused by a combination of factors including battery characteristics, ambient temperature, and usage habits. As a professional lead-acid battery manufacturer, we will explain the real reasons why electric bike range decreases in winter and how to easily solve it.

I. Battery Characteristics: Chemical ‘Hibernation’ in Low Temperatures

The performance of the lead-acid batteries we commonly use is closely related to temperature and is very sensitive to it. This is the core reason for poor range in winter.

• At around 25°C, the battery has the best activity and can fully deliver its capacity.
• When the temperature drops to 0°C–10°C, the internal chemical reaction slows down, and the actual usable capacity decreases significantly.
• The lower the temperature, the more pronounced this ‘shrinkage’ becomes.

Simply put: the battery is not broken; it just ‘cannot perform’ in the cold. It is not a quality issue.

II. Ambient Temperature: The ‘Invisible Killer’ of Range

In addition to the battery’s own characteristics, ambient temperature also significantly affects the range of electric bikes. In winter, roads may have snow or ice, requiring more power to overcome the resistance of slippery surfaces. At the same time, current discharges faster in low temperatures, leading to more noticeable power consumption. Moreover, when riding, we frequently brake and accelerate for safety, which increases energy consumption.

III. These Habits Make Range Even Worse

• Charging directly outdoors in low temperatures. Charging an electric bike outside in winter slows down charging and may not fully charge the battery, resulting in shorter range.
• Not riding for a long time and not recharging. Batteries self-discharge when idle, and low temperatures can damage a depleted battery more easily.

IV. Simple Tips to Get a Few More Kilometers in Winter

• Charge in a well-ventilated, separate shed or garage, avoiding cold environments like snow or ice.
• After the charger indicates full, let it charge for an additional 1–2 hours before unplugging (lead-acid batteries benefit from a full charge).
• When riding, accelerate slowly, brake less abruptly, and carry less weight.
• If not riding for a long time, recharge every 7–10 days.
• Avoid exposing the battery to wind, snow, or freezing conditions for extended periods.

V. When Is the Battery Really Broken?

If you have followed the above tips but still encounter the following situations, then consider replacing the battery:

• The charger indicator turns green very quickly, but the battery drains as soon as you ride.
• The battery is visibly swollen, hot, or leaking.
• The battery has been used for more than 2–3 years and has severely degraded.

Finally, remember that reduced range in winter is a normal characteristic of lead-acid batteries. There is no need to replace the battery as soon as it gets cold. Proper charging and daily maintenance can both improve range and extend battery life.

Cane Energy focuses on the R&D and production of lead-acid batteries, providing durable, reliable, and high-quality batteries suitable for electric bikes. We will continue to share practical battery maintenance and usage tips to help you spend less and use with more confidence.

Lead-Acid Battery Electric Vehicle Care Guide

As a mature chemical power source, lead-acid batteries offer high reliability, low cost, high-rate discharge capability, wide temperature adaptability, and recyclability. This makes them the mainstream power source for electric bicycles and the ideal choice for short-distance urban commuting, shared mobility, and logistics delivery. So, how can you properly maintain lead-acid batteries to extend their lifespan?

Charging: The Core of Maintenance

Always use the original charger to ensure the charging voltage matches the battery’s rated voltage (e.g., a 48V battery requires a 48V charger). Charge in a well-ventilated, dry area away from rain and flammable materials. Charging time is typically 6–8 hours; disconnect the charger promptly once fully charged to avoid overcharging.

Avoid Deep Discharge

Recharge the battery when its charge drops below 30%. Prolonged deep discharge (below 10%) can cause plate sulfation and shorten battery life. Avoid rapid acceleration and frequent braking during riding, as these high-current discharges increase battery stress.

Temperature Management

The optimal operating temperature is around 25°C. In summer, avoid direct sunlight, as high heat accelerates electrolyte evaporation and reduces capacity. In winter, keep the battery warm, as low temperatures increase internal resistance and reduce discharge performance. If the vehicle will be unused for an extended period, store it in a cool, dry place away from temperature fluctuations.

Regular Cleaning and Inspection

Periodically clean dust and corrosion from the battery surface with a damp cloth; avoid organic solvents. Check the terminals for looseness or oxidation. If oxidation is present, sand the terminals with sandpaper and apply petroleum jelly to prevent re-oxidation. Ensure connections are tight to avoid power loss from poor contact.

Equalization Charging

Perform equalization charging every three months: charge at a low current (about 0.1C, where C is battery capacity) for 12–24 hours to balance cell voltages and restore capacity. This helps prevent weak cells and extends overall battery life.

Safety Precautions

Lead-acid batteries contain corrosive electrolyte. Wear gloves and safety goggles during maintenance to avoid skin and eye contact. Dispose of used batteries through professional recycling channels; do not discard them casually.

Long-Term Storage

Before storing for more than one month, fully charge the battery, disconnect the cables, clean the surface, and apply anti-rust oil. Store in a dry, ventilated environment at 0–25°C, away from direct sunlight and moisture. Recharge every 1–2 months to maintain a charge level between 50% and 80%. Long-term storage in a depleted state can cause irreversible plate sulfation. Use the original charger and avoid overcharging.

Reviving a Depleted Battery

If the battery has been deeply discharged during storage, try activating it with a low current: first charge at 0.05C for 12 hours, then at 0.1C until full. If multiple attempts fail, the battery may need replacement.

Lead-acid batteries may lack flashy tech labels, but their reliable performance supports our daily lives in countless ways. Understanding how to use and maintain them helps us get the most out of these classic batteries. We hope this guide helps you appreciate this time-tested technology and the convenience it brings.