E-Bike Battery Replacement Guide (2024)

FAQs

How do I know what battery to get for my electric bike? ›

In choosing a lithium battery for your electric bike, you need to consider the voltage and ampere ratings. This is important as it determines the range, durability, and power input of your battery. Volts and amperes ratings are the two major talking points when choosing the right battery for your electric bike.

The battery AH rating should be chosen based on the motor power rating ÷ motor voltage rating x 1hr. A 48V 500W motor should be paired with a 48V battery that has an AH rating of at least 500W ÷ 48V x 1hr = 10.4AH. This helps assure that the battery will not be over stressed when driving the motor at max power.

Since motor speed is voltage dependent, using a higher voltage battery is the quickest way to substantially increase your speed. However, before you upgrade your 36V battery to 48V, for example, you'll want to check that your controller can handle the increased voltage (most can accept slight over-volting).

Battery Capacity

In a broader sense, the amp hour rating does tell us a little bit about the battery's capacity. For instance, a battery with a 10 Ah rating will last twice as long as a battery with a 5 Ah rating when used under similar conditions, but it does not mean that it will actually last 10 full hours.

Affirm does a soft check on your credit (which won't affect your credit score). These Li-ion batteries are our longest-lasting E-Bike battery and have a longer lifespan than other types of Lithium batteries. The battery typically lasts 2-4 years.

The following indicator lights will help determine your current battery percentage on your ebike: Red means your battery percentage is around or lower than 33%. Green means your battery percentage is average, within 33% - 66%. Blue means you have the most juice, anywhere between 66% - 100%.

Lithium batteries (and indeed any type of rechargeable battery) do not like to be left discharged. It is good practice to recharge as soon as is reasonably possible after the battery goes flat. We recommend charging after every ride, that way your electric bike is always ready for your next outing.

Are E-bike Batteries Interchangeable? In general, the answer is no – you should only replace a battery with one that comes from the same manufacturer and is of exactly the same spec.

Electric bikes typically come with a 48-volt or 52-volt battery. The difference between the two is power and performance: A 52V battery delivers better performance.

Generally speaking, most electric bikes do not charge when you pedal. They need their batteries to be plugged into a power outlet to be powered. However, some models offer the possibility of charging while you pedal, although this is often very inefficient.

Can I use a 52v battery on a 48v Ebike? ›

This is a common question many ask when they encounter 52v batteries while looking at a 48v ebike conversion motor kit. Can you safely use a 52v battery on a 48v motor? The answer is yes, almost always.

When you plug your battery in before your next ride, you should avoid charging it to 100%. Lithium ion batteries degrade over time. The longer they stay charged to a higher voltage, that degradation occurs. Also, avoid leaving your battery fully charged if you don't plan on riding your e-bike for an extended period.

When you charge a 48v battery it actually charges to 54.6 volts and when it is empty it will be somewhere around 40-41 volts. Most ebike displays can show the actual voltage of the battery at any point in the discharge cycle.

Low Amperage

Every vehicle has a minimum CCA requirement, and if you install a battery that is below that level, the vehicle may have a hard time starting or not start at all. The higher amp-hours (AH) a battery has, the greater its capacity.

In short, using batteries with extra energy capacity will not harm your device, but would, instead, power the device for a longer time (all other considerations unchanged).

The only difference between the two is that the 40 AH will hold a charge a little longer than the 35 AH because the plates have a slightly larger surface area. The power will still be the same because they have the same voltage.

​48V 14AH e-bike downtube battery with high capacity Samsung 35E cells and 40 amps output.

That is 36.3 miles per hour. So up to that speed, you can hit the throttle and get an assist.

You are likely using about 15 watt hours per mile. That means your 48 volt, 14.5 amp-hour battery - with a total of 696 watt hours - will give you a range of 46 miles at that usage level.

Description. Hold the pinhole button on a reset-capable device for 30 seconds while it is powered on to clear its local configuration. Once the device powers on and performs its initial check-in, it will download its network configuration as defined in the Datto Networking Portal.

Do you have to reprogram a battery? ›

The new battery does not have to be configured for the most current car models. Banner conclusion: No registration required; a check of the electrical functions after changing the battery is recommended.

Like desktop computers and most other electronics, disconnecting the battery cable for a short period will not fully reset your ECU due to the residual power remaining in the circuits.

The 80/20 Rule. Ideally you want to keep your battery between 80% and 20% voltage.

A blue light means that it is too cold to charge the battery. Lithium batteries cannot be charged at a temperature below 3°C (37.4°F).

If the battery is flashing blue LED means that is discharging and it is discharging based on the battery profile you set.

Yes, you can leave your electric bike battery charging overnight. There's no need to worry about overcharging or over-draining your e-bike battery.

Don't leave the battery on the charger for prolonged periods of time. Although most chargers have an auto-off function, you'll want to be sure there aren't any issues and store the battery off the charger. Every three months, check the charge level of your battery.

In perfect conditions, the battery in an electric bike can last up to 8 years. However, because lithium batteries slowly decline in capacity over time, a more realistic lifespan is between 3 to 5 years. For Blix batteries, you can expect a 25,000 mile (500-800 charging cycle) lifetime.

Yes, you can still ride your -bike even when the battery is dead or absent. An ebike is just an upgraded standard bicycle with the regular pedals still on. Most people use the battery when looking to go faster or for assistance when going uphill. You will notice some things when riding the ebike with a flat/no battery.

It's best to charge the e-bike or battery inside. Typically, you plug the charging unit into a wall outlet and then into the charging socket on the e-bike battery (many will have a cap that you'll need to remove first).

Can you run 2 batteries on an eBike? ›

A dual battery eBike is an excellent option for those who want to increase their range and improve the reliability of their eBike. The main benefit of having two batteries is traveling a long distance on a single charge. If one battery fails or needs to be charged, the second battery is a backup.

The most commonly used form-factor of cells in an e-bike battery pack is the 18650.

Generally speaking, a 250W e-bike motor will offer more than enough power for the average cyclist, riding at a leisurely pace on relatively flat terrain. Throw in extra variables, like a heavier rider, a higher required speed and a load of hills and an e-bike motor with higher watts may be better.

Never power on your e-bike while it is charging. Charge your e-bike in environments with an air temperature between 32° F (0° C) and 113°F (45°C). Always charge your e-bike to full battery capacity and unplug it when it's done: Do not leave it charging overnight or for extended periods of time.

The vast majority of electric bikes on the market will not charge when going downhill or braking. There are some that do, but it is rare and more of a sales gimmick.

Don't use uncertified or second-hand batteries or chargers. Plug battery chargers directly into a wall outlet. Don't use extension cords or power strips. Do not leave batteries unattended while charging, and do not charge them overnight.

The smallest size 48V system would consist of four 12V batteries set up in series.

Since motor speed is voltage dependent, using a higher voltage battery is the quickest way to substantially increase your speed.

If you are upgrading or replacing an existing battery pack, it is always safe to replace it with a battery that has the same nominal voltage. If you have a 36V ebike setup that is not from us, and are looking to 'upgrade' to a 48V/52V pack, more often than not you can do this without damaging the existing electronics.

Are E-bike Batteries Interchangeable? In general, the answer is no – you should only replace a battery with one that comes from the same manufacturer and is of exactly the same spec.

Can I use a 52V battery on a 48V motor? ›

Can you safely use a 52v battery on a 48v motor? The answer is yes, almost always. Let's take a look at why choosing a 52v battery is a good thing and not a cause for concern.