I believe that is 96R
BCI group size ( 40R ) for the 2.3 and 3.0 liter , according to the Owner Guide
According to the 2006 Ford Escape Owner Guide it has a Motorcraft BXT - 40R ( that would be BCI group size 40R )
According to the 2007 Ford Escape owners manual the V6 engine came from the factory with the ( Motorcraft BXT-40R battery ) ( that would be BCI group size 40R / 590 cold cranking amps )
group 78
The 2011 Ford Escape typically uses a Group 58 battery. However, it's always a good idea to verify the specific battery requirements for your vehicle by checking the owner's manual or consulting with a professional, as there can be variations depending on the engine and options.
Group Size=40R; Cold Cranking Amps (CCA)=590; 60 Amp/Hr Larger CCA models available. 720 CCA was the highest I have seen online, but 40R is the OEM group size.
fordparts.com shows the battery group size as being ( 56 )
According to the 2003 Ford Escape Owner Guide ; The 2.0 liter four cylinder engine came with the Motorcraft BXT-96R battery ( that's BCI group size 96R ) The 3.0 liter V6 engine came with the Motorcraft BXT-40R battery ( that's BCI group size 40R )
4 cylinder - BCI group size ( 96R ) 6 cylinder - BCI group size ( 40R )
group 34 approx 600 cca
group 34 approx 600 cca
It came from the factory with a ( 590 cold cranking amp battery / CCA ) BCI group size ( 40R )