This time it's Saft, the French(?) battery manufacturer.
They've come up with a vibration and high temperature resistant Li-ion cell for oil drill heads!
http://www.saftbatteries.com/000-corporate/pdf/64-07_eng.pdf
They've come up with a vibration and high temperature resistant Li-ion cell for oil drill heads!
http://www.saftbatteries.com/000-corporate/pdf/64-07_eng.pdf