Had a stay alive power issue when turning off the avionics. System would just shut off. Thinking battery, I replaced it. Ended up being a hardware fault with the G5 unit itself and not the battery.

Glass A Verified Purchase

Garmin G5 Back Up Battery

Check the date on your battery. They sent me a battery that was manufactured two years ago and now defective.

Zachary B Verified Purchase

Garmin G5 Back Up Battery

Way to pricy and when I installed it I immediately got a Critical Battery Fault message and my unit shut down. Garmin support told me to get a new one. Aircraft Spruce told me that my G5 just needed an update. Once I did that, my unit was fine. Not sure whats wrong with Garmin, but Aircraft Spruce was great and very helpful.

Scott W Verified Purchase

Garmin G5 Back Up Battery

This is a most when you need redundancy...

Airsports I Verified Purchase

Garmin G5 Back Up Battery

Battery worked fine. To install you need an Allen wrench the same size as your battery screws. This winch also fits the Allen screw in the center bottom hole on the G-5. The one screw holds the G-5 in the panel. Slide it out and replace the battery. Very easy.

Cary F Verified Purchase

Garmin G5 Back Up Battery

Great

Genavco A Verified Purchase

Garmin G5 Back Up Battery

A must have when one buys the G5

Jan H Verified Purchase

Garmin G5 Back Up Battery

So far, we purchased 2 dead ones.

Exact A Verified Purchase

Garmin G5 Back Up Battery

Arrived as expected and works as advertised.

Backup battery died after 3hours Have to have Aircraft Spruce Replace it G5 and battery purchase was in March 2022

First battery I got was dead out of the box and would not charge. I had to pay for shipping to return it, which was annoying. 2nd one is working fine so far...

Chris H Verified Purchase

Garmin G5 Back Up Battery

Circumstances required us to wait to install G5s in plane. 8 months later we installed units and found batteries would not take a charge. Trying now to see if Garmin will warranty batteries.

The battery failed after just 5 months. At $220 a pop, this isnt acceptable.

Aircraft Spruce gets 5 stars, Garmin 2. The batteries are very expensive and unreliable. The last one failed after 2 years of light use. Garmin needs to find somebody else to make their batteries. To be fair, the battery installed easily, worked properly and I received what I expected. Unfortunately, it may not last very long. At least they are readily available and easy to replace.

Brad L Verified Purchase

Garmin G5 Back Up Battery

This Garmin product has been quite the disappointment. I have 3 G-5’s installed and two batteries have already become unserviceable and needed replacement at a cost of over $400 USD. After installing the two “new” batteries neither of them will attain a 100% charge and continue to discharge at a very high rate requiring me to regularly charge the batteries while connected to an external charger. All three G-5’s have the latest firmware update too. The strange thing is that the original battery installed in one of the G-5’s continues to function as advertised. I would not purchase another one of these batteries until Garmin addresses this problem which they are already aware of.

Robert J Verified Purchase

Garmin G5 Back Up Battery

Some back-up....new unit arrived with a dead battery, bought a replacement from AS, it arrived dead and wont charge and now a third one has been installed and it too arrived dead and will not charge. I have 2 G5s installed so I can move them around to check them. the G5s work but the batteries are $200 pieces of junk.

Had to order 3rd one. First two didn’t charge. Went through all kinds of issues with my G5 trying to get it to charge. But it was the battery’s 3rd times the charm. I should have just opened it up and fixed it. Love my Garmin but the battery’s 👎