Perfect fit. On time delivery.

Larry V Verified Purchase

ACK E-04 Replacement Battery

As advertised, was easy to install for another 5 years service.

John C Verified Purchase

ACK E-04 Replacement Battery

Aircraft Spruce responded very efficiently to my request for a replacement battery for my ACK E-04 ELT. The battery arrived in short order and has a good 5-year life remaining. Great customer service.

Raymond H Verified Purchase

ACK E-04 Replacement Battery

Great

Darwyn S Verified Purchase

ACK E-04 Replacement Battery

Great replacement for my ELT battery.

John G Verified Purchase

ACK E-04 Replacement Battery

As advertised and delivered promptly.

Jelle B Verified Purchase

ACK E-04 Replacement Battery

Quick delivery. Works as expected.

Magnus Verified Purchase

ACK E-04 Replacement Battery

Good delivery time.

G J Verified Purchase

ACK E-04 Replacement Battery

The part is fine. Double check the shelf life and make sure it hasnt been on the shelf for months.

Mark L Verified Purchase

ACK E-04 Replacement Battery

Great service

Leading E Verified Purchase

ACK E-04 Replacement Battery

Battery shipped same day and received in 2 days. Expiration date was within 58 out of a maximum of 60 months when received.

Mcm A Verified Purchase

ACK E-04 Replacement Battery

Works fine

James M Verified Purchase

ACK E-04 Replacement Battery

Two thumbs up!

Ervin G Verified Purchase

ACK E-04 Replacement Battery

Arrived promptly and in good condition.

Walter E Verified Purchase

ACK E-04 Replacement Battery

Product was good but the five year battery life is only good for four and a half years because it was on the shelf somewhere for six months.

Martin N Verified Purchase

ACK E-04 Replacement Battery

5 stars

John A Verified Purchase

ACK E-04 Replacement Battery

battery received had lower voltage than battery being replaced. never received requested return label

William J Verified Purchase

ACK E-04 Replacement Battery

Expensive, but Spruce had a fresh one in inventory when I needed it.

Bernard W Verified Purchase

ACK E-04 Replacement Battery

Battery expiration date is nearly five years from purchase date on this specific battery, so battery was very recently manufactured. No issues on installation, good fit. Would buy again.

Ned S Verified Purchase

ACK E-04 Replacement Battery

To expensive but works as advertised

David L Verified Purchase

ACK E-04 Replacement Battery

Aircraft Spruce has always provided fast and efficient service. My opinion is that they have always met my needs and expectations.

Leo J Verified Purchase

ACK E-04 Replacement Battery

All good - not much more one can say about a routine replacement part...

John W Verified Purchase

ACK E-04 Replacement Battery

Easy to replace. Battery was dated 5 years minus one month from purchase, so almost the whole 5 years of use. I also replaced the lithium battery in the remote pilot control and the audible device, which are good for ten years.

Chris A Verified Purchase

ACK E-04 Replacement Battery

good service,Price scary.

Parker T Verified Purchase

ACK E-04 Replacement Battery

So far it works, lets hope we dont have to use it for real!

Obrien A Verified Purchase

ACK E-04 Replacement Battery

Exactly what I needed at the best price, fast delivery. Thanks A/c Soruce…

Edwin L Verified Purchase

ACK E-04 Replacement Battery

Great battery, even at replacement, voltage was nearly new equivalent!

Jon R Verified Purchase

ACK E-04 Replacement Battery

exact fit

Dale K Verified Purchase

ACK E-04 Replacement Battery

Illustrated instructions would be appreciated.

James T Verified Purchase

ACK E-04 Replacement Battery

Ive never had a problem with these batteries. This one sat on the shelf for three months before it was sold to me. Thats inappropriate for a product with an expiration date. When I brought it to the attention of Customer Service, I received a proration on the battery life.

A&p S Verified Purchase

ACK E-04 Replacement Battery

Easy to install by owner.

Robert K Verified Purchase

ACK E-04 Replacement Battery

I hope I don’t need to use this battery.

Chris S Verified Purchase

ACK E-04 Replacement Battery

Great products. Great customer service.

Mike K Verified Purchase

ACK E-04 Replacement Battery

Exactly what I needed.

W S Verified Purchase

ACK E-04 Replacement Battery

Good fast service and shipping. Thanks

Alvin A Verified Purchase

ACK E-04 Replacement Battery

Easy installation, four Allen screws. no issues and recently manufactured battery.

Mark B Verified Purchase

ACK E-04 Replacement Battery

Worked perfect

Richard W Verified Purchase

ACK E-04 Replacement Battery

So thankful this was a stock item.

Olivas A Verified Purchase

ACK E-04 Replacement Battery

Five year battery and very easy to replace

Jeffrey S Verified Purchase

ACK E-04 Replacement Battery

Arrived promptly and packaged well

Daniel H Verified Purchase

ACK E-04 Replacement Battery

Very good product

Gandera C Verified Purchase

ACK E-04 Replacement Battery

Got a really FRESH battery only a few WEEKS old, and delivered in DAYS. Perfect.

Ray V Verified Purchase

ACK E-04 Replacement Battery

In stock with current date code. Quick easy replacement.

Terry C Verified Purchase

ACK E-04 Replacement Battery

it was great

Jerry O Verified Purchase

ACK E-04 Replacement Battery

Correct battery, reasonably recent date of manufacture.

Nicholas K Verified Purchase

ACK E-04 Replacement Battery

works perfectly

Stanley T Verified Purchase

ACK E-04 Replacement Battery

Exactly as shown, and easily installed.

Leon L Verified Purchase

ACK E-04 Replacement Battery

Exact replacement. Very recent mfg date.

Howard L Verified Purchase

ACK E-04 Replacement Battery

Great Service from Aircraft Spruce. Manufacture date was July 2021. Cant beat that for serivice.

Milon W Verified Purchase

ACK E-04 Replacement Battery

Battery was just a few weeks old which is amazing in todays shipping environment. Good for 5 full years.

George A Verified Purchase

ACK E-04 Replacement Battery

Came in a reasonable time and had a very recent manufacture date on it, so is good for a full five years.

Robert C Verified Purchase

ACK E-04 Replacement Battery

Its an over priced battery I am forced to buy. My last one lasted two years less than it was suppose to.

Valerie W Verified Purchase

ACK E-04 Replacement Battery

The E-04 is not a perfect gadget, but at least its easy to change the battery. The one I received in May 2021 appears to be quite fresh, the expiration is 4/26.

Douglas M Verified Purchase

ACK E-04 Replacement Battery

installed in aircraft - no issues

As advertised Exact replacement

The battery’s mfg date was less than 1 month old

Excellent service

Battery arrived in a timely manner, and simple replacement with old unit. Battery date was 2 months old, so happy it is fresh. Thank you for prompt shipping, even for standard ground shipping. Always a pleasure to deal with Aircraft Spruce.

Battery arrived in a timely manner, and simple replacement with old unit. Battery date was 2 months old, so happy it is fresh. Thank you for prompt shipping, even for standard ground shipping. Always a pleasure to deal with Aircraft Spruce.

Battery arrived in a timely manner, and simple replacement with old unit. Battery date was 2 months old, so happy it is fresh. Thank you for prompt shipping, even for standard ground shipping. Always a pleasure to deal with Aircraft Spruce.

Easy, quick

all is fine

Easy to order online. Fast delivery. Hope I dont have to find out if it works!

Arrived promptly and in good condition.

Very happy with order and quick shopping

Bought the ELT years ago and was happy to see the battery was available quickly and not at an outrageous price.

Shipped fast and the battery was really new. Like about two weeks old. Impressive service.

Shipped fast. Easy installation. Worked as expected. Expiration date was a month less than the month we were on.

Battery was in stock and shipped quickly. Battery manufacture date was within three weeks of delivery to me which is outstanding. Changeout was a breeze. Highly recommended.

Works great, lasts a long time.

Battery is exactly as expected, but was 4 months old. I recommend calling and requesting you have the newest one available shipped.

Surprised me by arriving exactly on the day first promised. Wish there was a short instruction sheet on how to install and orientation that needs to be maintained

Gerry G Verified Purchase

ACK E-04 Replacement Battery

Battery Delivered was Within 45 Days of Manufacture for Longer Expiration Period. ACK Needs to Mark Positive/Negative Poles Better on Unit.

Glen O Verified Purchase

ACK E-04 Replacement Battery

Battery already 5 month old. For the price we should have a full 5 years of use.

Fits. Pricey.

Good product, but was a little unhappy with getting a 7 month old battery. I needed it to fly and there was not another one available to exchange.

Happy with the purchase. My new battery was only 2 months old out of the box so it’s still good for 4 years and 10 months.

Would have gave 5 stars but ACK had a back order on these.(3 weeks) Not Aircraft Spruces fault.

The only problem I had with this order was not with aircraft Spruce but with ups who would not allow a pickup at there terminal which was only 10 minutes away

Easy replacement for expired old battery. Sure seems like a lot of money for a battery, though.

David F Verified Purchase

ACK E-04 Replacement Battery

Crazy expensive, but what are you going to do. ACS has a “good” price.

Mark E Verified Purchase

ACK E-04 Replacement Battery

I fully appreciate that this product is hard to keep in a current month expiration status, but when I received my two batteries in January that had been made in November I wasnt really shipped a 5 year battery. Your comments would greatly be appreciated John

Like the ACK ELT, but hate the cost of this replacement battery. Seems like another case of stick it to the customer because he has no choice but to use our battery configuration.

I love Spruce overall and especially your speedy delivery. On this product I was surprised and disappointed that battery shelf life expires in Sep 2023. It is replacing a battery that never flew because aircraft is still under construction. I hope for first flight this year. I was under the impression battery was good for 5 years from manufacture or 1 st flight. I should have waited until closer to 1 st flight There were no instructions for disposal of old battery.

When you purchase battery I suggest speaking to aircraft spruce in advance to confirm the expiry date ... The battery I received was not 5 years - almost 5 months expired already - no price adjustment for the lapse (shipping back is not economical - due to cost) - the response provided we will send batteries with up to 75% of expiry date - my thoughts are - adjust price to reflect amount of time time expiry date - heads up !

Arrived with a manufacture date in Oct, so it is already 6 months old.