KR> batteries

[Eric Evezard]

Hi Netters,
I have just installed a new maintenance free lead calcium battery in my car.Has 
anyone had any adverse effects from this type of battery.?Has anyone used this 
type of battery in an aircraft ,with no problems.?One cannot measure the SG 
with an hydrometer,with the lead calcium battery,and must rely on the  voltage 
meter,and ammeter readings.Is this OK ?
Best Regards,
Eric,
South Africa