been having trouble with my battery, so have bought a new one.
Put my reg into eurocarparts and chose the budget one:
Lion Battery (063 Battery - 3 Year Guarantee)Product Code: 444770631
I'm now wondering if this would be suitable - it should be as the search brought it up, however it says that it has calcium technology and dont know what this means? I thought MX-5's were suposed to use a Gel battery, is this true?
Ideally i'd like this one to be compatible as i can then put it in a go out and enjoy the sun. Would rather not have to go back and swap it if I can avoid doing so.
Is anyone able to tell me if this would be ok to use? Any help is greatly appreciated. Car is a 2.5 NB 1.8 S-VT.
AFAIK most modern lead acid batteries are now ‘calcium’ technology. They use lead-calcium (rather than lead-antimony, I think) in the plates to improve reliability and performance. They are not necessarily gel batteries though. Gel batteries use a gel type electrolyte, not liquid, and are common in motorcycles - some bikes even locate the battery on its side. I’m not aware that gel batteries are common in normal road cars.
The OEM battery is a Panasonic - available from mx5parts or from your local dealer. I would NEVER buy anything else - they will last for at least twelve years, some members report longer.
The Panasonic battery is vented - if you check the location in the boot you will see the vent pipes. It is IMPORTANT to only fit a gel, vented battery, or fumes will eventually corrode the boot surround. There are incidents involving non vented batteries causing more than corrosion, as in one case in the States (reported by one member) not involving an MX5 BTW - where a mother and child were overcome by sulphuric fumes and crashed the car, resulting in death to both. Isolated incident, but it provokes thought.
Cost? Well they aren’t cheap, but length of service equals at least two lead acid batteries, which may be cheaper individually, but add up to more than. See http://www.mx5parts.co.uk/battery-genuine-mazda-panasonic-mk1-25-p-3756.html
Check with your Area A/C - if a discount has been arranged between the Area and a local Mazda dealer, then you may get a better price than MX5parts, but if no discount available, then buy from them. As you say you have already bought the other battery, if it’s definitely a gel type and does have vents, then I can only suggest you either return it - if refundable? - or fit it for now, (if it fits) and buy a Panasonic next time.
Thanks I have now had the correct battery fitted and the vent pipes repaired. Apparently the battery only vents if the gasses produced exceed 2psi. Thanks for all your help. Chris
In ideal conditions a battery does not produce a meaningful volume of gas to vent. Overcharging, for whatever reason is the cause of the production and bubbling of gas. Lead acid batteries with the relatively new calcium technology produce less gas when overcharged.
In my opinion most corrosive damage caused by batteries to MK1/Eunos MX5 boots is related to acid leakage from poorly mounted/vented lead acid batteries rather than as a result of gas.