Get the right voltage on your aviation battery charger Airplane batteries generally come in 12 and 24 volts, and the one you choose depends on the model of your airplane. Smaller single-engine planes usually take 12 volts, while larger planes need more power. Refer to your owner's manual to make sure that you get the right airplane charger for your plane.

I recommend:  Shop around for different voltage aircraft battery chargers. VDC Electronics and Battery Mart both offer a wide variety of 12- and 24-volt models to suit your needs and budget.

Consider buying an automatic charger for your aircraft batteries If you run a busy shop, it's easy to get sidetracked and forget how long a battery has been on the charger. Furthermore, it may be difficult to find out exactly how depleted a battery is, which can lead to over-charging and possibly damage to the battery. Automatic chargers take the guess-work out by automatically shutting off when the battery is full.

I recommend:  Pick a good automatic battery charger. Check out the models that both Aircraft Spruce & Specialty and Desser Tire and Rubber have to offer. The added automation may cost a bit more than a regular charger but is well worth it for most mechanics and airplane owners.

Make sure that your aircraft power supply and charger are compatible with your aircraft If your airplane or battery is still under warranty, the manufacturer may have very specific instructions on how and when you should charge the battery. Make sure to read the manual and talk with the battery charger vendor to find out what type of charger the company recommends for your aircraft.

I recommend:  Talk to a pro before committing to an aircraft charger. Chief Aircraft and QC Avionix are both shops that will work with you to find the right charger for your needs, no matter what type of aircraft you own or operate.