New battery recommendation please

scooter paul

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My R100/7 is in need of a new battery I feel. I usually plump for Yuasa as my local bike dealer supplies these. However when I went on the Motorworks website there is a multitude of different makes. I don’t mind spending up if it makes a difference. This bike gets used so quality wins over cheapness for me. I’ve never really understood AH ( amp hour) are more AH better? Some of the options on the website go up to 30AH. Recommendations please but not lithium.
 
Halfords stock bike batteries. Using a Trade card makes it a worthwhile price, and you have the benefit of a local store if there's any issue.
If you don't have one, know anyone with a card?


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Ah is just a measure of the total storage in a battery. A higher number is useful, especially if you have a lot of accessories connected, you do short journeys or you leave the bike parked for long periods. If the bike is used frequently for decent length journeys so topped up frequently, a lower Ah rating is okay.
The other measure is CCA (cold cranking amps). This is a measure of the battery efficiency when cold. A bigger number is useful if the bike is used in winter.
Then you need to choose between a wet battery and the more recent developments, gel, AGM or lithium. AGM is my preference.

The Motorworks page gives a lot of different options at https://www.motorworks.co.uk/catalogsearch/result/?q=+r100/7+battery - the physical size and Ah vary considerably

Tayna is more specific https://www.tayna.co.uk/motorcycle-batteries/f/bmw/r100-7-76-84/ - note the physical size is pretty consistent
Tayna is my preferred battery supplier. Of those listed, I would ignore the wet batteries although they are a lot cheaper and your OEM battery from the factory would have been wet. The wet CCA is very low. I like Exide batteries and it is 30% cheaper than the lower spec Yuasa and half the price of the Yuasa battery with special gold lettering and 500CCA.
 
Ah is just a measure of the total storage in a battery. A higher number is useful, especially if you have a lot of accessories connected, you do short journeys or you leave the bike parked for long periods. If the bike is used frequently for decent length journeys so topped up frequently, a lower Ah rating is okay.
The other measure is CCA (cold cranking amps). This is a measure of the battery efficiency when cold. A bigger number is useful if the bike is used in winter.
Then you need to choose between a wet battery and the more recent developments, gel, AGM or lithium. AGM is my preference.

The Motorworks page gives a lot of different options at https://www.motorworks.co.uk/catalogsearch/result/?q=+r100/7+battery - the physical size and Ah vary considerably

Tayna is more specific https://www.tayna.co.uk/motorcycle-batteries/f/bmw/r100-7-76-84/ - note the physical size is pretty consistent
Tayna is my preferred battery supplier. Of those listed, I would ignore the wet batteries although they are a lot cheaper and your OEM battery from the factory would have been wet. The wet CCA is very low. I like Exide batteries and it is 30% cheaper than the lower spec Yuasa and half the price of the Yuasa battery with special gold lettering and 500CCA.
Thank you. That’s the sort of knowledge I was after.
 

This is where I get the batteries from. More pricey but 24 months warranty and some weight saving (It is actually quite weird how light they are). Mine was tested last year in 40 deg C heat in the desert with no issues. Straight swap as well.

No link with the seller.
 
Motobatt do great batteries. I put one on my Tiger. Same physical size but more output.
 

This is where I get the batteries from. More pricey but 24 months warranty and some weight saving (It is actually quite weird how light they are). Mine was tested last year in 40 deg C heat in the desert with no issues. Straight swap as well.

No link with the seller.
Lithium batteries are not for airheads
 
Lithium batteries are not for airheads

I’m sure there’s a joke there somewhere…

Aside of which, lithium batteries do like a controlled environment, and ideally will have a battery management system (BMS) to ensure they’re warm, safe & happy. Older bike might be unable to ensure their conditions are met, particularly if no BMS in the battery.

If they don’t get what the need, they may misbehave, which might include frying your ass, or simply switching off.
 
I’m sure there’s a joke there somewhere…

Aside of which, lithium batteries do like a controlled environment, and ideally will have a battery management system (BMS) to ensure they’re warm, safe & happy. Older bike might be unable to ensure their conditions are met, particularly if no BMS in the battery.

If they don’t get what the need, they may misbehave, which might include frying your ass, or simply switching off.
Yes thats why Lithium batteries are not a good idea for airheads.
Aren't you supposed to have a MOSFET regulator fitted ?
 
Well, the battery I fitted is fine, has been tested in harsher conditions than most and is sold as a straight swap.
 


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