12 Volt Portable Power Supply With Cessna Style 3 Pin Plug

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Part# 11-05084
MFR Model# JAC2512-CEC


These portable power supplies are an excellent way to power your avionics on the ground while you train or practice in the cockpit. Especially helpful in learning how to operate glass cockpit avionics and panel mount GPS units. To use the Portable Power Supply plug the cord into an AC wall outlet, and then connect the 3-pin plug into the external power receptacle on your aircraft. Furnished with Cessna style 3-pin plug. Manufactured in U.S.A.

This unit can also be used as a battery charger, by using the battery clip adapter which is provided with the unit.
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


  • Charge control: constant current charge to a constant voltage then to a float standby.
  • Current Limiting.
  • Fully automatic 3 stage charger can be left on the battery in maintaining/float mode.
  • Can be set for any type lead acid battery, including conventional, maintenance free, deep cycle, gelled-type, valve regulated batteries.
  • Continuous - 100% duty cycle.
  • Low voltage start: will start charging a deeply discharged battery with terminal voltage less than 4 volts.
  • Reverse polarity and short circuit proof.
  • Aluminum caset.
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Works great. Powers up everything.

J D Verified Purchase


February 15, 2022

Boyd G Verified Purchase


February 7, 2022

Works great! Charges my battery and upon reaching full charge it goes automatically into maintenance mode. Mine services flood batteries, as well as AGM/GEL batteries (like the one in my aircraft).

February 9, 2021

Super happy with this power supply plug. Our intended use is for training on new avionics in the hangar. Works great, price is right.

March 10, 2019

Although I was only going to be using this unit as a power source so that I could run my new all glass panel on the ground, I read the previous reviews that talked about static in the audio when using the system. Since that did not apply to me I bought it anyway and use it as I intended to up grade the software without running down my battery. I have found however that I have NO static or audio problems when using this unit like some others have reported. Works great, I love it!

Donald P
November 18, 2018

Purchased to Learn / play with / Update Avionics on the ground in the Hanger My 1977 C182Q immediately came to life as I plugged the Schafer 12-volt power supply into its external ground power plug with the Master OFF and I was able to casually get my Garmin Flight Stream 510 set up and up avionics databases updated Given it’s late November I went ahead and turned all the lights on, lowered the flaps and looked everything over well while not on battery power - something I’ll probably do more often from time to time with this new capability

Mike M
November 23, 2017

Works as advertised. Only drawback was it took so long to ship and arrive.

Jacque L
August 4, 2019

After a recent panel upgrade I wanted to be able to power things up in order to train without the possibility of draining the battery. This unit is much more attractively priced than several others. I would have happily given a 5 star rating save for one issue. Radio reception has a good bit of static due to a lack of an in line filter. However this is not a huge drawback as I don’t have a need to listen to the local traffic, only to change settings etc. As an added bonus it does come with a battery charging attachment.

October 7, 2018

For ground operation/training to power your glass panel, this unit is excellent. That said, if you desire to use head sets for audio, listen to traffic as you train, this unit is NOT desireable. It puts out so much Rf intreference that all you hear is static. After discusssing findings with the manufacturing rep, I came to the conclusion it is working as designed....Just not good with audio.

Terry M
June 1, 2016


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What is the amperage out put?

This is a 12V / 25 Amp battery charger. We requested the information from the manufacturer and they directed us to the specification sheet. You can find this in the "Documents" tab or by clicking here.

Q: Is just the plug (red part) of this portable power supply available for purchase separately?

Yes, see our part # 11-03158 for the plug only.

Q: Light aircraft systems are 14v or 28v. This product is rated at 12v and its big brother at 24v. Will the 12-14v and 24-26v discrepancies lead to aircraft systems damage?

No, the 12 volt version can be used on 14 volt systems without damaging the system. Same goes for 24 volt version on 28 volt aircraft systems.

Q: Does this 12 volt portable power supply charge the battery, act as a power supply, and crank assist?

The three port adapter will power the panel, the alligator clips will charge the battery but will not do crank assist.

Q: What is the input voltage?

It is 120 or 240, it is auto sensing.

Q: Are the the alligator clips for charging the battery included?

Yes the battery clip adapter is included.

Q: How many volts does the 12 volt unit put out?

Cyclic voltage for flooded batteries is 2.47v and 2.4v for agm and gell batteries.

Q: Will this power the avionics on a c172M thru the Auxiliary port?

Yes, this fits the 3 pin auxiliary power port on most Cessna aircraft.

Q: Does this work on bonanzas as well? 1969 V35A

It will work with any aircraft that has the cessna style plug. We recommend checking the charger port on your aircraft to see if it has the 3 pin style Cessna style receptacle.

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