I bought my baby a SHIDO Battery LiFePO4 (Lithium Iron Phosphate).
Comes with a 3 Years Warranty. Works perfectly. No complaints.
What are the advantages of SHIDO LION batteries
over normal Lead-Acid batteries?
Superb Cranking Capacity: up to 50% more than Lead-Acid batteries
Weight: between 1/3 and 1/5th of Lead-Acid batteries
No Sulfating: longer service life
Lower Self Discharge: longer shelf life in the warehouse before use
Excellent Cycle Life: more than 2.000 cycles (Lead - Acid batteries: +/- 300)
Drop-in replacement: 1 to 1 replacement dimensions for OEM battery
Less Fuel Consumption: thanks to higher OCV the engine works more efficient
Super-fast Recharge: very high recharging rate trough high current
No explosion risk: no gasses are produced during charge or discharge
No maintenance: no acid fill, no leak risk, installation in any direction
Stable Discharge Voltage: better engine performance, easy engine start
Ecological advantage: no pollution, no lead, no acid, safe & normal disposal.
Downside:
How does a SHIDO LION battery reacts on cold temperatures?
The resistance of SHIDO LION batteries increases at low temperatures. But they will do their job until -10 degrees Celsius. But thanks to the special techniques and the management system built in the SHIDO LION batteries, they will perform much better than other Lithium batteries in cold conditions. There is also a simple trick you can use: if the battery performs poor under extreme cold conditions, use your headlight during 10 - 15 seconds before cranking. This will warm up the battery and afterwards she will perform better.
Price is higher than standard batteries.