Charging & Maintenance
Can I use my charger if it charges at 2, 6, or 8 amps, but the manual recommends 3 amps for initial charging?
Yes. First, identify if your charger is Constant Current or Constant Voltage.
Constant Current: Follow the recommended charge rate and time in the Gill Service Manual. Use a reliable timer to end charging.
Constant Voltage: You can use any setting, but charging is complete when current drops below ½ ampere.
Always use aviation-approved chargers for best results.
Can I use a 12-volt automotive charger for my new 12-volt aircraft battery?
It’s not recommended. Automotive chargers may not regulate voltage precisely enough for aircraft batteries and could reduce battery life or void your warranty. Use a charger that meets the specifications in the Gill Service Manual.
Is it okay to charge my battery for a few hours today and finish tomorrow?
Yes. You can pause charging and resume the next day. For best results, try to complete the charge in one session. Gill batteries do not suffer from a "memory effect."
Can I charge my battery while it’s installed in the aircraft?
No. Always remove the battery from the aircraft before charging to protect both the battery and the aircraft’s electrical system.
When should I add distilled water to a low cell?
Add distilled water during the initial stages of charging. After charging and resting for 3–4 hours, the battery voltage should read about 13 volts.
Is it okay to add electrolyte after the initial conditioning?
No. Only add distilled water after the initial fill and conditioning. Adding more electrolyte can damage the battery and reduce its lifespan.
How often should I replace my Gill aircraft battery?
Replace your battery every 2½ to 3 years for best reliability, even if it appears to be working well.
How do I store my aircraft battery when not in use?
Store in a cool, dry place. Check the open-circuit voltage periodically and recharge if it drops below 75% of full charge. Avoid extreme temperatures.
Installation & Operation
Where is the “split ring” for filling electrolyte?
The split ring is about ¾ inch below the cell opening. On initial fill, cover the plates with electrolyte (about ⅛ inch above plates). After charging, ensure the level is just below the split ring.
What causes acid droplets around the top of my battery?
Possible causes include overcharging, overfilling, high-resistance cells, or loose caps. Check for proper fill levels and secure caps tightly.
What is the correct voltage for a fully charged battery?
12-volt battery: 13.00 to 13.20 volts
24-volt battery: 26.00 to 26.40 volts
How do I know when my battery needs replacing?
If engine starts are sluggish even with a fully charged battery and the starter is in good condition, it may be time to replace. Also, follow the recommended replacement interval.
Product & Warranty
Can I use automotive electrolyte in my aircraft battery?
No. Automotive electrolyte has a lower specific gravity (1.260) than required (1.285). Using the wrong electrolyte will reduce performance and void your warranty.
Are there specific chargers recommended for Gill batteries?
Yes. Teledyne offers chargers specifically designed for Gill batteries, including the TDMC Dual Mode Battery Charger. Always use aviation-approved chargers.
What is the warranty on Gill aircraft batteries?
Gill dry-charged lead-acid batteries are warranted for 12 months or 600 hours after installation (whichever comes first). Some defects may be covered for up to 15 months or 900 hours.
General Use & Troubleshooting
What should I do if my battery is not holding a charge?
Check for proper electrolyte levels, terminal corrosion, and ensure you are using an appropriate charger. If issues persist, the battery may need replacement.
Can I use my aircraft battery in other vehicles or equipment?
No. Aircraft batteries are engineered for aviation use and may not perform safely or effectively in other applications.
How do I dispose of or recycle my old aircraft battery?
Return your old battery to an authorized service center or recycling facility. Due to environmental regulations, do not dispose of batteries in regular trash.
My battery is swelling or leaking. What should I do?
Discontinue use immediately. Remove the battery safely, avoiding contact with leaked electrolyte, and contact your service provider for proper disposal and replacement.
Always consult the Gill Service Manual or contact Teledyne Battery Products technical support for more detailed instructions and product support.
