Why Does My Battery Keep Dying? 7 Common Causes and Fixes

You charge your electric-bike fully. After a few hours or even the next morning, it drops to zero again. Your bike will not start when you turn it on because your inverter battery cannot hold the power through a single power outage. It can be frustrating because the first instinct for most people is the same:

"This battery is faulty and you need a replacement."

But here is the thing: a battery that keeps you going does not automatically mean it is a bad battery. In many cases, the battery itself is perfectly fine but the real problem is caused by the internal system of the battery. You need to replace it when it is drying out temporarily, before the new one starts failing too.

The cause can be related to several factors, including incorrect charging, heavy usage and loose connections, as well as battery age in the electrical system. By replacing the battery immediately, you must not need to solve the problem. 

That is why it is important to find the reason behind repeated battery drain before spending the money on a new battery. 

You need to simplify the charger, connections, and usage pattern to help you narrow down the cause. In this blog, we will look at 7 common reasons why your  battery keeps dying and the practical fixes we need to apply. 

The Battery Is Not Charged Fully 

What could be happening?

Sometimes you see that your battery is acting normal, but out of nowhere your charger reached to zero. This can happen when the charging process is interrupted and the charger is not providing the correct output. This is disconnected before the battery completes by its charging cycle. A battery that is repeatedly left partially charged can deliver less and interrupted power. If this is happening regularly, then the battery can appear to be "dying quickly," even if the actual problem is that it is not receiving a complete charge.

Common Signs

1. The Lithium battery starts dropping faster than usual.
2. The charging process finishes faster than it normally does.
3. The battery indicator shows full charging, but the power supply is very low.
4. The battery needs repeated charging and often shows unexpected fault indications.
5. The lithium battery takes a long time to reach a normal charging level.

Fix

• You need to check the required electric-bike battery that is needed along with the voltage and current.

• You must make sure the smart charger is designed for the lithium battery. Just do not settle for a single choice that is associated with your plug-in connectors. 

• The intelligent charger output must match your battery's voltage and chemistry with charging current and all other requirements set by the manufacturer.

• You should allow the lithium battery to complete its recommended charging cycle.

• You must avoid unplugging the smart charger before your battery reaches the required charging level.

You are Using the Wrong or Incompatible Charger

Why does the smart charger matter?

A smart charger does not supply energy to your battery. It supplies electrical power to your battery. It should be able to supply the voltage along with the right current according to the charging conditions of that battery.

It is extremely crucial that the lithium batteries are compatible in terms of their functionality because some types of batteries have to be charged in certain ways. This happens due to differences in materials and construction.

What can happen with an unsuitable charger?

The battery may charge slowly or incompletely. If the charger's output does not match the battery's requirements, then it takes much longer to charge or do not reach the required charge level. The charging produces unnecessary heat that leads to poor charging control and issues such as short circuits and damage to the entire thermal system.

Your smart charger can stop unexpectedly or fail to charge properly. A battery's BMS can interrupt smart charging when it detects conditions such as incorrect voltage, excessive current or high temperature. You can repeatedly charge with an unsuitable charger that can contribute to reduced usable capacity and shorter runtime.

Fix

1. You can check the manufacturer's specifications first. Always look at the battery's required charging voltage and current with recommended charger type before buying or using a charger.
   
   

2. You can make it compatible with the smart charger's voltage and the battery. A smart charger must deliver the charging voltage for the battery pack. Never assume that two batteries will have the same voltage and can use the same charger. They might look the same. They are not always compatible.
   
   

3. For a lithium battery, you need to check the chemistry. That means looking at your product it's lithium-ion, lithium-polymer or another type? Each one has charging requirements. The wrong charge can damage the battery, so you always double-check the battery type before connecting a smart charger.
   
   

4. You need to confirm the chemistry of your lithium battery.  Lithium-ion and lithium battery types can have different charging requirements with the charger that must be designed for the specific battery chemistry.

The Battery Has Lost Capacity With Age

Why does this happen?

Lithium Batteries have naturally lost capacity through regular use and charging cycles. A battery might be able to store and deliver the same amount of energy it could when it was all new. This means a battery can still show that it is fully charged, but "full" does not mean it has the same capacity as before. An older battery can reach its normal charging voltage along with providing less runtime under the same load. 

It depends on how quickly a battery loses its capacity but it is still affected by factors such as battery type, number of charging cycles and operating temperature.

Signs of an Aging Battery

1. Shorter runtime: The battery needs charging more often due to cover the same distance or operating time as it did once.
   
   

2. Battery Percentage: The battery shows a reasonable charge level at first but loses its voltage quickly when the vehicle or equipment is being used.
   
   

3. Charging Does Not  Last: The smart charger completes the charging process normally but after charging, it still provides less runtime than before.
   
   

4. Performance Inconsistent: The battery delivers inconsistent performance but charges fully. Also, the indicators show that the charging is full.

Fix

1. The battery needs to be tested rather than replaced immediately. A proper battery test can help analyze whether the battery has actually lost its capacity or whether the problem is coming from the smart charger and another part of the system.
   
   

2. You need to compare its current performance with its original specifications. First, you must look at the battery's rated capacity, expected runtime and normal operating voltage.
   
   

3.  A battery that looks weak can not be the only problem. An unsuitable charger or poor connection can also cause reduced performance.
   
   

4. There are frequent charging cycles, heavy use, high temperatures and other operating conditions can contribute to capacity loss of the battery.

Your Usage Is Draining the Battery Faster 

1. What increases battery consumption?

First, consider your average distance, riding conditions and load, and how often you accelerate. You need to carry less weight and can reduce the amount of voltage the battery needs. Next, it is essential to maintain a steady riding style. The smoother the acceleration is more you will avoid unnecessarily high speeds that can help you to reduce energy consumption.

2. Why does it Matter?

There are some higher power demands that can make the battery reach a low state of charge faster. Also, there are some frequent accelerations, high speeds and uphill riding that all require more power from the battery. There are some higher power demands that can make the battery reach a low state of charge faster. Also, there are some frequent accelerations, high speeds and uphill riding that all require more power from the battery.

A battery that works normally under light loads can drop quickly when the electric-bike is used under heavier loads. Also, there are some heavy uses that do not always mean the battery is faulty.

3. Fix
   
   

• Compare your current usage with the battery’s intended capacity. You need to look at your daily distance, riding speed and number of trips, along with the type of roads you normally use.
  
  

• You need to consider whether the battery capacity is suitable for your daily requirements or not. If you regularly travel long distances, then you must carry heavy loads, ride uphill or use the electric-bike for several hours a day.
  
  

• You can check your riding pattern before assuming there must be a battery problem. If the battery drains very fast only during heavy use, your riding conditions can be the reason.

Your Next Battery Drying

A lithium battery that keeps dying quickly is not necessarily ready for replacement. Before you spend money on a new battery. You need to figure out what is actually causing the real problem. The issue could be related to the charging process, smart charger compatibility and battery age along with an electrical fault. You need to check these factors first that can help you identify the actual cause and avoid unnecessary replacement costs. A battery might perform normally when it is charged with the correct Smart EV charger and used under suitable conditions. The wrong charger, poor connections, excessive load or extreme temperatures can affect its performance.

The right charger, compatible battery and correct charging process need to work together to support reliable battery performance. You need to choose a smart charger according to the battery’s voltage, charging current and BMS requirements.

If you are looking for a suitable charging solution for your electric-bike and scooter, you need to explore Sass Smart Chargers from EV. With 3Amp, 5Amp, and 8Amp options, you can choose a smart charger based on your battery specifications and charging requirements rather than simply choosing the highest current.

Visit Sass EV to learn more about its smart charging solutions and dealership program.