Hi . Can you recommend a decent battery ? The one iv got is not holding the charge. And slow to crank (NUMAX YTZ7S 12v 5ah) Don't mind paying if it's a good one .
5amp battery woes, super bike gone to far. Must say I'm quite impressed with the lithium battery in my 650 single fine after being layed up for 6 months.
I’ve got a few shido lithium on some bikes and a couple of anti gravity lithium as well, they’ve all been faultless so far and the oldest shido is about 6 years old now.
Numax is never going to be reliable. If you have an alarm any 5amp battery will suffer, unless used every day.
I went for a shido lithium battery on my last blade (2011), way better than the standard battery, and much lighter too.
OEM yuasa (which is expensive). Mottobat lithium, expensive and much lower capacity than lead acid so you need to know what capacity suits your riding
It's more complicated than that. Cranking power is not related to capacity, but rather the internal resistance of the battery. Lithium charge and discharge rates are quoted in 'C'. If you have a battery rated at 1C charge, 5C discharge, that is 100Ah capacity, (like a leisure battery for example) that means you can charge it up to 100A, and discharge it at 500A safely. Numbers picked for illustration, they are not usual in real world. As for capacities - I have said a few times already, Lithium capacities are not comparable to typical lead-acids. A lead battery is flat when it's used about 50% of its "Rated" capacity. A lithium can use almost 100%. An AGM deep cycle lead-acid battery is more like 75-80%. TL;DR If you want to replace a 7ah bike battery with an equivalent lithium, anything from about 3ah up is just fine. Physically, the lithium cells can definitely provide as much cold cranking amps as your lead-acid, usually a lot more (C rating), but that depends on the control board (Battery Management System, or BMS) that's inside the casing.
jay, that is the mistake most people make! Parlt because of the lithium battery marketting strategies. As Coda wrote, CCA is different to capacity (Ah). LPF battery for RR8 is probable rated at 2.4Ah vs 6Ah! Even the CCA they quote is not SAE nor DIN standard as it is for lead acid. Think of them as two tanks of water with and pipe outlet at the bottom. lead acid holds more water but smaller diameter outlet, LFP, smaller tank but with a larger diameter outlet (hight flow> cranking amp)
