New EarthX Batteries STC's for 150+ 12V Aircraft!

[Neal]

I may be wrong on this but if you land and have depleted your ignition backup and as stated above you've depleted your starter battery, you're not going anywhere. I believe the starter battery will require a BMS reset which requires a charger like the Optimate to perform.

Regardless, none of this replaces the need for a proper battery for the task and my request to EarthX remains and we can't say the ETX-104 is the right solution as it is. The risk may be low but I'd rather have the risk zero and never have to worry about it.

I hope none of us ever have to use our ignition backup battery.

 

[Neal]

I disagree. If the emergency ignition battery is used in flight it is quite likely to be deeply discharged.

If, perhaps after landing, the reason for needing the emergency battery is rectified if should be possible to re-charge the emergency ignition battery with the alternator without blowing the fuse or toasting the blocking diode.

I would not fit that battery unless I had that assurance. There is no high charging current issue with the TCW 3AH IBBS which is still my preferred solution.

Now someone is going to tell me I should fit a pigtail and use a charger. I can't plug in a charger if I made a precautionary landing in the boonies!

Let's discuss this a little further @Cactus Charlie. I contemplated moving this discussion out of this thread but I'll leave it for now.

Let's say you end up needing your backup ignition, let's say you're using the factory setup so you have your AGM. It's 6 months old. You lost your alternator, now you've depleted your starter battery and you had to fail over to your ignition backup. You used it for approximately 15 minutes and landed safely on a desert area and avoid all of the pretty cactus.

What are you going to do? You have a depleted starter battery, maybe you have a jump pack and can get the engine going again. Let's assume you fixed the alternator issue. But you just had to rely on your ignition backup and it is NOT recharged. Are you really going to fly this plane knowing you're ignition backup is now compromised? You have no way of charging it, nor your starter battery.

This scenario now makes me think of carrying my optimate charger in my aft cargo as it usually remains in the hangar. I may have to have someone fly out or drive out a generator so I can get 120V power and charge both batteries but in my situation I do have a pigtail on both the starter and ignition backup battery.

What would you do (WWYD) is an interesting scenario to think through on this one. What state of batteries are you going to fly out of this with?