Do you need a lawn mower battery charger for your ride-on mower or tractor? There are a complete range of lawn mower battery chargers available, from quick chargers, trickle chargers, and standard chargers.
Most ride-on mowers and tractors use 12-volt batteries. On some older models built before the 1980s, you may find a 6-volt battery.
Buying Guide [3 Things To Consider]
Choosing a new lawnmower battery charger needn’t be complicated. Reading our buying guide below before reading the review of 5 lawn mower battery chargers! It will help you find the best one easier and quicker.
Voltage: First, check which voltage you need. It may be 6-volt, 12-volt, or 24-volt.
Type of charger: If you have a lead-acid style battery, then you can choose the best charger for your circumstances. In this case, look for one that offers a maintenance mode and can be permanently connected to the battery.
This will give your battery the most extended life possible, and can even revive what looks like a dead battery.
Around 2-amps is ideal for trickle charging batteries, but you can use up to 8-amps. The lower the amperage, the longer the battery will take to recharge.
Type of connector: Third, do you need a specific connector? Cordless lawn mowers will usually have this, and the Earthwise 24-volt lawn mower battery charger could be ideal.
Safety features: You’ll find a range of safety features offered by the different chargers, and we also review one that can charge four batteries at once.
Here, we review a range of lawnmower battery chargers to help you find the best one.
Best Lawn Mower Battery Chargers Review
3 Best Lawn Mower Battery Chargers: Comparison Table
 Battery Tender Junior |  BatteryMINDer 1510 |  DieHard 71219 |
|
|---|---|---|---|
| Customer Rating |  |  |  |
| Price |  | | |
| Volatage | 12V | 12V | 6/12V |
| Amperage | 0.75A | 1.5A | 2A |
| Charge time (40 Ah battery) | 53 hours | 26 hours | 20 hours |
| Multi Stage Charging | 4 stages | 7 stages | 5 stages |
| Reverse polarity protection | ✔ | ✔ | ✔ |
| Maintenance mode | ✔ | ✔ | ✔ |
| Overcharge protection | ✔ | ✔ | ✔ |
| Desulfating mode | -- | ✔ | -- |
| Charge multiple batteries | -- | ✔ | -- |
| Indicators | ✔ | -- | ✔ |
Battery Tender Junior 12V Charger & Maintainer
The Battery Tender Junior is designed primarily for battery maintenance, rather than a lawn mower battery charger. This version has an output of 0.75 amps, so to bring a flat battery to full charge could take several days.
When connected, the charger goes through a four-step charging process: Initialization, Bulk Charging Mode, Absorption Mode, and Float Mode. This process brings the battery to a full charge without over-charging, and it can be safely left connected permanently.
The float mode keeps your battery in top condition, and your lawn mower ready to go at all times. Perfect during the winter when your lawn mower is not in use.
Connecting the Battery Tender is super easy, especially with a 12-foot charging cable and the spark-proof connection system. Don’t worry about connecting the battery charger the wrong way round, as it features a reverse polarity detector, keeping you and your battery safe.
Simple indicators keep you informed of the battery’s charge state. When initially connected, the LED will be red. Once when the battery is charged, it switches to green.
The Battery Tender Junior then keeps your lawn mower battery at the correct voltage automatically. Leave the charger connected whenever your lawn mower is not in use, and your battery will always be ready.
Pros
- Four-stage charging system
- Switches to maintenance mode when the battery is fully charged
- Clear indicator lights
- Spark proof connection of charging cables
- Small and compact
- 5-year warranty
Cons
- Slow to charge a completely flat battery
- The information in the manual is not very clear
Who is it for?
This charger is perfect for anyone that stores their lawn mower for several months. It will maintain the lawn mower battery in excellent condition, for when you next need it.
Check Price at AmazonRead also to find more Battery Tender options for your mower battery: Battery Tender® Junior vs. Battery Tender® Plus vs. Battery Tender® 800: Which battery charger do you need?
BatteryMINDer 1510 12V Battery Charger
The multistage BatteryMINDer will keep your lawn mower battery in perfect condition. Just leave the charger connected over winter, and your battery will be ready for the summer mowing season.
BatteryMINDer’s 1510 battery charger includes some useful features that make it stand out from the crowd.
One of the best features is that it can charge and maintain up to four batteries at once. This is great if you have multiple batteries to store over winter. You do need to buy some additional connectors, but the benefit will easily outweigh the cost.
Another outstanding feature is the desulfate mode that removes the lead sulfate crystals that build up in the battery.
Your battery could last up to four times as long when it is regularly connected to the BatteryMINDer. If you have a battery that is not holding its charge, this feature could bring it back to life and save you money.
The charger is fully automatic once connected and uses a seven-stage process to test, repair, and condition your battery. With the built-in ambient temperature sensor, the charger selects the correct charging program for your battery.
Wherever it needs a fast charge to bring the voltage back up a trickle charge or desulfation, you just plug and go.
Safety features include reverse polarity, short-circuit, and over-charging protection.
Pros
- Dead battery recovery
- Long 10-year warranty
- Extended charging cord
- Charge four batteries at once
Cons
- More expensive than other lawn mower chargers
- LED lights are small and difficult to see
Who is it for?
The BatteryMINDer is ideal if you have multiple batteries to maintain. Although it’s more expensive than some lawn mower battery chargers, charging four batteries at once will save you money.
Check Price at AmazonDieHard 71219 6/12V Battery Charger
The Diehard 71219 can charge both 6V and 12V batteries. It automatically detects the voltage of the connected battery and adjusts the voltage accordingly. This is useful if you have older cordless lawn mowers that operate at 6-volts.
Charging is a 5-stage process controlled by a microprocessor, for exact control of the battery conditioning. The initial mode assesses the battery condition before choosing the next stage.
The Diehard includes a desulfation mode to bring batteries back to life and a maintenance mode to keep your lawn mower battery in top condition.
Once your battery is fully charged, the Diehard switches to a 2-amp float mode to keep the battery healthy. Float mode switches on and off as required to maintain the ideal battery voltage at all times.
Built-in safety features include a reverse polarity warning and overcharging prevention.
Pros
- Works on both 6-volt and 12-volt batteries
- Fully automatic
- Supplied with accessory plug charging adaptor
- Clear indicator lights
- Reverse polarity protection – LED’s flash and charger won’t operate
Cons
- Large size compared to others
- The connecting clamps may be too small for larger battery terminals
Who is it for?
This could be ideal if you have older 6-volt batteries to charge along with 12-volt batteries. No need to buy two chargers, the Diehard 71219 can charge both types of batteries.
Diehard is ideal for boats, RV’s, cars, and many other applications along with maintaining your lawn mower battery.
Check Price at AmazonMEEARO EE0035 5A 12V Battery Charger
The MEEARO 12-volt charger is ideal as a lawnmower battery charger.
Featuring a three-stage charging system, the MEEARO automatically charges at the correct amperage:
- When you first connect the charger, it will fast charge your battery.
- As the battery voltage nears the right level, it will reduce the charging rate.
- And finally, it switches to the trickle charge mode to maintain your battery’s charge.
The pulse repair function is useful for reviving and repairing some battery damage. It does this by removing the sulfate built up on the battery plates and extending the battery life. A severely damaged battery will be beyond repair, though, and will need replacing.
Built-in safety features include reverse polarity protection, over-voltage protection, short-circuit protection, and more.
The LED screen provides a range of information while in operation, including charge voltage, charge current, and ambient temperature. While charging, the MEEARO uses the outside temperature to adjust the charging rate accordingly.
Pros
- Easy to read LED screen
- Multiple safety features
- Fast charging
- Check the battery charge without a multimeter
- Switches to trickle charge when the battery is fully charged
- Suitable for almost all battery types (Not Lithium-ion)
Cons
- The cables are a little short
- Plastic connectors are not very strong
Who is it for?
The MEEARO is ideal for anyone looking for an affordable lawn mower battery charger with plenty of features.
Check Price at AmazonEarthwise CH80024 24V Lawn Mower Battery Charger
Some cordless lawn mowers use a 24-volt battery system and require a specialized charger. The Earthwise CH80024 24V lawn mower battery charger is an aftermarket replacement for the original.
Replacement battery chargers usually are much cheaper than the originals. The Earthwise CH80024 is around half the price of the OEM product and includes free shipping. This particular charger fits Earthwise, Homelite, and other cordless lawn mowers.
The charger has two indicator lights:
- The red light means the battery is charging
- The green one comes on once it’s fully charged.
The lights are a little difficult to see in bright sunlight, but okay apart from that.
The charging time for most batteries is around ten to twelve hours, and it is essential to disconnect the charger when the green indicator comes on. If you don’t, the battery will overcharge with a risk of damaging it.
Pros
- Around half the price of an original manufacturer charger
- Free shipping
- Compact design
- Long warranty
Cons
- Will overcharge when charging too long
- Indicator lights too dim in bright sunlight
Who is it for?
The Earthwise is a replacement for the original charger when it fails. It is much cheaper than the original and charges the battery faster.
It’s ideal for someone that does not want to pay the original manufacturer’s price for a replacement.
Check Price at AmazonHow to Know When a Lawn Mower Battery Is Dead?
Often, the first time you realize there is a problem with the battery, the lawnmower won’t start. If you hear a clicking noise, this is a good sign the battery may need replacing.
If your lawn mower won’t start, there are some checks you can make on the battery:
The first thing to look at is the battery terminals. Are the cables loose or even disconnected? Tighten the connections and try starting the lawn mower.
While you are checking the battery, take a look at the water level in the battery cells. If they are low, top them up with distilled water. Don’t use tap water as it contains minerals that are bad for your battery.
If you have a multimeter, then check the battery charge. A good 12-volt battery should read around 12.6 volts on the meter. If not, then connect it to a trickle charger. A meter reading of below 10.5 volts shows the battery is probably past saving, and you should replace it.
Charging Guide
Note: Always charge your battery in a well-ventilated space. Either charge it outside, undercover, or ventilate the room by opening a door or window.
- Wet-cell batteries contain acid, so wear protective clothing, gloves, and safety glasses.
- If the lawn mower is not going to be used for a long time, disconnect the battery.
- Connect the charger to the battery. The positive red lead of the charger to the positive battery terminal and the negative black lead to the negative battery terminal. If you connect them incorrectly, some chargers will show a warning.
- Connect the charger to the mains and switch on.
- Work out the charging time for the battery and disconnect when completed to avoid overcharging. If you have a trickle charger with maintenance feature, you can wait until the charger has completed its cycle. Consult the charger manual for guidance.
- Reconnect the battery and try to start the lawn mower. If the battery has not held the charge, it will need replacing.
FAQs
How long should a lawnmower battery last?
Broadly speaking, you should expect your lawn mower battery to last between three and five years. However, you can help your battery last longer with good maintenance.
Often, batteries are left unused for around six months, which could be terminal. But using a battery maintainer could save it and help it last much longer.
What size battery charger do I need for my lawn mower?
It is essential that you use the correct lawn mower battery charger. Most lawn mower batteries are now 12 volts, but check as there are still some 6-volt batteries. You can also find 24-volt batteries, so do check before buying.
Many battery chargers on the market can detect either 6-volt or 12-volt automatically. For the charging power, slow trickle charging is the best method. Fast charging your battery at a high amperage will reduce its performance and life.
Can I charge a lawn mower battery with a car charger?
If the battery on your lawn mower is a standard 12-volt battery charger will work.
How long does it take to charge a lawn mower battery at two amps?
This depends on the amp-hour rating of the battery. For example, if your lawn mower battery is rated at 24 amps, it will take around 12 hours to charge fully from flat.
Is it better to charge a battery at two amps or ten amps?
For general recharging, you can charge at a higher amperage, and the battery will be charged more quickly.
However, charging too fast and for too long can shorten the battery life. Trickle charging at lower amps is typically used for maintaining a battery when it is not in use.
Read more: The Difference: U1 vs. U1R Battery [with best mower/tractor batteries for the money review 2021]
