You are entitled to believe whatever you want, but for the benefit of other posters;
To say that a car starting battery is specific for one particular car is absolute bollocks!
There is a big difference between a "deep cycle" battery, and a battery designed for cranking an engine. A diesel engine by default is "harder" to crank than the same size petrol engine, so the cranking battery will need to have a higher CCA rating than that in a petrol engine, even a V8. At least 750 CCA is a minimum.
A "deep cycle" battery is designed to have a relatively small load placed on it over a long period of time, such as running a car fridge. These batteries should not be used in a cranking application.
That is the major difference likely to be found in automotive use.
The case size and layout of the terminals will be different between different makes of cars, but that has NO effect on the internals.
There are several types of "modern" automotive batteries that use different internal materials, such as the quoted Calcium type. There are batteries called AGM (absorbent glass mat) such as Optima, that have a spiral construction in place of flat plates. These types of batteries are very expensive but have a long life and mostly found in emergency service vehicles and boats where reliability is essential. They are completely sealed and can be mounted in any position, as well as being acceptable for transport by air.
There is yet another new type called "lead crystal", which have yet to prove themselves.
But, ALL of them designed for vehicles, are "lead acid" type batteries, and NONE of them are manufactured for just one brand of vehicle.
Just as an example: the engine in your Ford Ranger is the same 2.2 Litre engine used in a Land Rover Defender, and despite JLR wanting to rob owners, they do not require a Land Rover specific battery!
As I noted previously, the charging system used on different makes of cars can and does vary. Ford evidently have their own way of achieving this. The general practice with later model cars is to have control over the alternator output by the cars ECU or PCU, rather than the older and well established basic voltage regulator. Another result of European emission standards!
BUT, whatever the intricacies of the control system, the alternator is designed to charge an automotive type of lead acid battery, even if it is made by Father Christmas to use on his sleigh!
Without breaking my arm, nor am I an expert, I have been around batteries in a multitude of different types and applications since I was 8 years old and my Father taught me how to add water to a bank of lead acid batteries on the farm 32 Volt system. I served a 5year apprenticeship in an electrical workshop, and have spent most of my life connected in some way with electrical systems, from 12 Volt car generators right up to 6.6Kv systems on an automated oil drilling Drillship. Then there was the period when I was licenced to work on 28 Volt aircraft systems.
Rant over!
Any battery can fail prematurely, guarantee or not. What gets up my nose with this type of thing is the blatant BS being handed out to a customer that should not be expected to know any better! It comes down to the sad fact that most of these people dispensing this BS have little or NO training. Some of it may get lost in translation, but when the basic facts are just ignored, then that excuse does not hold water!
