Smallest 12v battery possible?

[phil0185]

I'm converting a bike from 6v to 12v.

The current 6v battery is:

70mm long
70mm wide
95mm high

I can modify the bay to accept a longer battery but only up to 100mm in height. Therefore the Yuasa Yumicron YB2.5L-C, which is:

80mm long
70mm wide
105mm high

...will not be suitable.

The best one I can find at the moment is the Yuasa Yumicron YB4L-B, which is:

120mm long
70mm wide
92mm high

Does anyone know of a 12v battery which is closer to the original 6v battery dimensions? Remember, it can't be higher than 100mm! Sealed lead acid suggestions also welcomed.

[The Shaggy D.A.]

Depending on your budget, you could go Lithium :-

https://www.ebay.co.uk/itm/Gilera-Freestyle-E-Starter-Shorai-Lithium-Standard-Motorcycle-Battery-LFX09A2-/200740613944?pt=Motorcycles_Parts_Accessories&hash=item2ebd12af38

113x58x89mm. Pricier, but also a lot lighter, higher cold start cranking amps, charges faster and lasts longer.

[edit] Cheaper, and as there's no acid I can't see why it couldn't be mounted on its side (61x61x112mm) :-

https://www.ebay.co.uk/itm/2004-2009-Honda-CRF250X-Ballistic-EVO2-4-Cell-Lithium-Motorcycle-Battery-NEW-/310404615616?pt=Motorcycles_Parts_Accessories&hash=item48458e8dc0
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