Expensive but necessary. Surprisingly the expired ones still had plenty of voltage. New ones still have four years to expiration but were a year old since manufacture

James Z Verified Purchase

Ak-451 Replacement 4 Pack Batteries

Fits right, works well, 4 year validity.

Vine A Verified Purchase

Ak-451 Replacement 4 Pack Batteries

As described

David M Verified Purchase

Ak-451 Replacement 4 Pack Batteries

A quick delivery, with the batteries needed for my ELT

Jeff C Verified Purchase

Ultralife Lithium D Cell Battery U10029

Good product

Mike G Verified Purchase

Ultralife Lithium D Cell Battery U10029

Fresh batteries that last 5 years. Very grateful to Aircraft spruce for offering them!

Viatcheslav K Verified Purchase

Ak-451 Replacement 4 Pack Batteries

Great service

Ernst M Verified Purchase

Ak-451 Replacement 4 Pack Batteries

Batteries out of date by 8 months , not what I expected from Aircraft Soruce

Michael K Verified Purchase

Ak-451 Replacement 4 Pack Batteries

I was glad to find them. Works great

Wayne A Verified Purchase

Ak-451 Replacement 4 Pack Batteries

All ok .. good service

Jacques M Verified Purchase

Ak-451 Replacement 4 Pack Batteries

All worked out well

Albert V Verified Purchase

Ultralife Lithium D Cell Battery U10029

There is no way to rate batteries.

The C Verified Purchase

Ak-451 Replacement 4 Pack Batteries

Exactly what I needed. The expiration date is printed on battery as well

Shipped quickly, fit perfectly. Easy install. Came with change date. I made my own sticker for the ELT but that was easy. Good for almost 5 more years.

Just what the doctor ordered

Very best price and arrived on time.

Prompt service and delivery. Product as advertised and shown. Very happy with purchase.

My AK-451 batteries were due for replacement. Rumor had it that replacement cells were not available. Our chapter tech counselor suggested checking the Aircraft Spruce on line catalog. Sure enough, there they were. I ordered a set and they appeared to be identical to the originals right down to the manufacturer. I checked their voltages which were identical to the originals, 3V. Keep in mind that while they are D size, they are not your hardware store D cells which are 1.5V. I installed them in my AK-451 which tested perfectly. Time will tell how they will hold up, but hopefully I will never need to use them for real! Im happy with my purchase.

My AK-451 batteries were due for replacement. Rumor had it that replacement cells were not available. Our chapter tech counselor suggested checking the Aircraft Spruce on line catalog. Sure enough, there they were. I ordered a set and they appeared to be identical to the originals right down to the manufacturer. I checked their voltages which were identical to the originals, 3V. Keep in mind that while they are D size, they are not your hardware store D cells which are 1.5V. I installed them in my AK-451 which tested perfectly. Time will tell how they will hold up, but hopefully I will never need to use them for real! Im happy with my purchase.

Arrived as advertised. I wish they had come with expiration sticker

It would be nice if the battery pack came with a sticker to apply over the old sticker on the ELT with the new battery replacement date.

Last installation of these batteries only lasted 3 years. No operations of my ELT in that time. hope this next set lasts longer

Even though these batteries are the exact same as the old certified ones, here in Canada the avionic shops wont touch them.