A C182 pilot wearing a sound attenuating headset that used a nuon 9V battery reported that on three ...

Narrative:

My concern stems from a trend I first experienced in october of 2008. I did not report my initial incident since I had attributed it to be a single occurrence. Since then I've had two other incidents involving 'nuon' 9V batteries. This is the brand issued to me for use in my david clark anr's. I was on an IFR flight plan and had departed 17L and in a right turn into marginal IMC. Climbing through about 3;500 ft MSL; I heard a loud pop noise and felt something hit me in the face just to the right of my right eye. I also smelled a faint sulfur like odor. I looked down in the right front passengers floorboard where I had a cessna cup and item holder sitting. In one of the small compartments of the holder I noticed my spare 'nuon' 9V that I stored there for convenience if needed. It had blown up. The top of the battery had literally blown off the battery. A white or lite bluish paste like substance had scattered around the cockpit. It was some of this substance that struck me next to my right eye. Five days later; I was on another flight in VFR conditions at 6;500 ft MSL when I smelled something getting hot. A bit of a pungent electrical like smell. I had started storing my nuon 9V batteries in their box since the incident 5 days earlier. I opened the box and found that one of the new batteries was so hot it was melting the exterior cover & too hot to hold. I tossed the entire box into a small ice chest I had in the back seat for safe keeping until landing. Very recently while flying I was level in VFR conditions at about 3;000 ft MSL when the battery cover on my david clark anr battery box popped off. I looked at it closer and saw that the side of yet another 'nuon' 9V had blown away. I removed the battery and continued on without my anr's functioning. I no longer use this brand of batteries and buy my own quality batteries. It is in my opinion that the 'nuon' 9V batteries constitute the possibility of an in-flight safety hazard.

Original NASA ASRS Text

Title: A C182 pilot wearing a sound attenuating headset that used a NUON 9V battery reported that on three occasions a NUON 9V battery had exploded or overheated in the the aircraft in flight.

Narrative: My concern stems from a trend I first experienced in October of 2008. I did not report my initial incident since I had attributed it to be a single occurrence. Since then I've had two other incidents involving 'NUON' 9V batteries. This is the brand issued to me for use in my David Clark ANR's. I was on an IFR flight plan and had departed 17L and in a right turn into marginal IMC. Climbing through about 3;500 FT MSL; I heard a loud pop noise and felt something hit me in the face just to the right of my right eye. I also smelled a faint sulfur like odor. I looked down in the right front passengers floorboard where I had a Cessna cup and item holder sitting. In one of the small compartments of the holder I noticed my spare 'NUON' 9V that I stored there for convenience if needed. It had blown up. The top of the battery had literally blown off the battery. A white or lite bluish paste like substance had scattered around the cockpit. It was some of this substance that struck me next to my right eye. Five days later; I was on another flight in VFR conditions at 6;500 FT MSL when I smelled something getting hot. A bit of a pungent electrical like smell. I had started storing my NUON 9V batteries in their box since the incident 5 days earlier. I opened the box and found that one of the new batteries was so hot it was melting the exterior cover & too hot to hold. I tossed the entire box into a small ice chest I had in the back seat for safe keeping until landing. Very recently While flying I was level in VFR conditions at about 3;000 FT MSL when the battery cover on my David Clark ANR battery box popped off. I looked at it closer and saw that the side of yet another 'NUON' 9V had blown away. I removed the battery and continued on without my ANR's functioning. I no longer use this brand of batteries and buy my own quality batteries. It is in my opinion that the 'NUON' 9V batteries constitute the possibility of an in-flight safety hazard.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	889680
Time
Date	201004
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Instrument
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 5500 Flight Crew Type 4000
Events
Anomaly	Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

A C182 pilot wearing a sound attenuating headset that used a nuon 9V battery reported that on three occasions a nuon 9V battery had exploded or overheated in the the aircraft in flight.