
Photo courtesy of M.Barkley at Flickr.com.
Rechargeable batteries are a bit like plants. Too much heat or moisture can kill them, and they perform best when taken care of properly. Here are some steps you can take to get greater endurance per battery charge and longer overall life:
1.) Protect your batteries from overcharging
When a battery is fully charged and additional energy is pumped in, the energy has to go somewhere. That’s why batteries get hot - it’s a sign of energy overload. If your batteries overheat, that can reduce the number of total usable charges. Instead of getting 1,000 charges out of the battery, you might only get 200 before it has to be thrown away. Many chargers have temperature sensors, but relying on them to protect your batteries is a little bit like relying on an air bag to protect your car from accidents (both only work after damage occurs).
To protect your batteries from overcharging, you should avoid plugging them into the charger for longer than they take to reach maximum capacity. When you plug in the charger, set an alarm clock to remind you about unplugging the batteries. And, you should charge the batteries in a cool, well ventilated place to reduce heat buildup.
2.) Watch out for water
Batteries and water don’t mix.
Batteries should be kept clean and dry. Moist accumulations of dirt on a battery may cause it to lose its charge due to current flowing through the moist dirt from one post to the other.
Even small amounts of moisture can sap the energy from your battery and cause corrosion. If your tool shed or garage gets humid, that might not be the best place to store your battery between uses.
3.) Avoid shaking or rattling batteries
It’s a common misconception that shaking batteries can get the last “juice” out of a nearly empty battery. That’s not true, and shaking batteries can cause damage to the cell walls which reduces their long-term ability to hold a charge. In fact, vibration damage is a leading cause of battery failure. That really makes you wonder about cell phones in vibrate mode, doesn’t it?
You can avoid vibration when storing batteries too. For example, if you’re carrying lawn mowing gear in the back of a truck, it’s a good idea to tie down the equipment tightly. If you’re driving on a really rough road, you can go one step further and bring the battery packs into the cabin with you (truck beds tend to have lousy suspension systems compared to the crew cabin). Likewise, storing batteries on the edge of your work bench should be avoided if you use the same bench to hammer nails.
4.) Charge the batteries right before they’re needed
Batteries lose charge over time, even when they’re not used. For example, Nickel Metal Hydride batteries lose about 1% of their charge per day. So, to get the most performance from a battery pack, it helps to charge it shortly before use.
There are also trickle chargers and float chargers that steadily add small amounts of power. The idea behind these chargers is to gradually replace electricity at the same rate that the battery loses it. Unfortunately, many of these trickle chargers can still overcharge batteries.
5.) Clean the contacts
The contacts of a battery (and the contacts of a charger too!) will get dirty over time. Any dirt or corrosion will disrupt the flow of electricity across the contact. So, after unplugging the charger and discharging the battery, you can use a gentle cleaner to remove corrosion. Make sure to use proper safety precautions and avoid electrical shock.
6.) Charge your batteries before they’re totally empty
When you drive your car, you generally put gas in before the tank runs dry. Likewise, you should recharge batteries before they run down completely. In certain applications, you’ll have much better battery life with a shallow Depth of Discharge.

Photo courtesy of ditzlerphoto at Flickr.com.
With these tips in mind, you can get the most possible battery life from your electric gear. If your batteries run a little low, you can also juice them up with a booster pack, such as this solar charged battery booster, which we offer for $79.99.

We also carry several lawn mowers and trimmers powered by high endurance battery packs. If you want to take a slice out of your gas bill and enjoy some clean air in your garden, you might consider the Earthwise Cordless 20-inch Electric Mower for $349.99.

A manual reel mower with battery assist is an even more efficient choice. These reel mowers help you exercise and supplement their battery with muscle power. If the battery runs low for any reason, you can keep using the mower! We carry the Brill Accu ASM380 cordless electric reel mower for $374.99.
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