There's been a few threads on V40 battery types.

Volvo used to advise the EFB for manual cars and AGM for automatics, but if you check out their latest update on battery types they no longer advise a battery type depending on gearbox.
They now say "EFB or stronger", there's no mention of gearbox type.
So basically they are now saying that the EFB type is fine in any V40.

However, if you are replacing the smaller support battery it has to tbe AGM in all cases.

This is their latest battery update :

V40 Battery - Start/Stop | Volvo Support EN-TH

Volvo Support for V40 Battery - Start/Stop | Cars with Start/Stop function, in addition to the starter battery, are equipped with a support battery.

www.volvocars.com

And this is the older advise :

V40 Battery - Start/Stop | Volvo Support EN-TH

Volvo Support for V40 Battery - Start/Stop | Cars with Start/Stop function, in addition to the starter battery, are equipped with a support battery.

www.volvocars.com

You'll notice the difference in the wording under the section "IMPORTANT"

I've never removed the battery (EFB) on my V40 but I would guess it's not just a case of unbolting one and replacing with another as I think the V40 has some sort of battery monitoring system that might need resetting ?

 

Yeh, I read a load of the threads but none seem to say they have fitted an AGM in place of an EFB.

Having read some info on the Varta site they seem to advise that upgrading shouldn't cause any issues.

As for the battery monitoring it's an easy manual reset once the new battery is installed.

 

I guess it depends on how you rate your existing battery ?
I've never had an issue with my existing battery (EFB), however as I do very little mileage I was getting the "Low Battery Charge" warning, which seems to be a popular subject on the forum.

I took the car to a number of garages, including my local Volvo dealership to have the batteries tested, each time I was told the batteries are getting the charge from the alternator and holding the charge but as I do so little mileage Monday to Friday and then the car is parked up over the weekend the sensitive battery monitoring system is picking up a very slight drop in voltage, hence the battery charge warning.
I just put it on a maintenance trickle charge now over the weekend every few months, no issues since doing this.

I asked about fitting the stronger AGM but was told it wouldn't make a difference as it's the low mileage I do after starting the car in the mornings for work.
I only travel about 3 miles to work and then the car is sitting there all day until it's time to drive back home, so the charge is not being put back into the battery, so after a while I was getting the get the charge warning.

 

AGM batteries were supposed to be the dog's dangly things, but after many years of use in the leisure industry in particular, it is apparent that they don't live up to the hype. EFB however, have proven to be quite robust. The only real advantage of an AGM battery is that it can't spill or lose fluid, so it is suited to installation situations where it has to be installed on its side, or where it is very difficult to access (the secondary battery on our cars). For a normal vehicle starter battery I would use EFB in preference every time. Decent EFB batteries such as Bosch, Varta, Yuasa etc, and Volvo labelled batteries which are likely to be manufactured by one of the big suppliers, use valve technology to prevent fluid loss, which brings them much closer to the only real advantage that AGM batteries ever had.

 

I was told very similar to what RS has said above.

 

Cheers all, ordered a Varta EFB, just going like for like as the OEM EFB has lasted 7 years fault free.

 

I had the same thought, my EFB battery lasted more than 7 years so I replaced it with another EFB. Peace of mind.