Battery replacement OEM or Lithium Ion??

[Levisp]

Yes David. The bolt / floating nut arrangement can be a real pain particular when attaching the positive terminal while balancing the battery on a knee.

[Nick Evans]

And back to the original post; a question. Why would you want to put an Li-ON battery in an RT? What is the benefit? Sounds like more money than sense to me. And another thing, do Li-ON batteries require different charging electronics?

[David.]

This is the OEM battery for both Hexhead & Camhead RT's, 19 Ah & 170 CCA, GEL type.



I've had three OEM BMW(Exide) GEL batteries & they've lasted between 3.5 & 5 years, now on to my fourth Exide (fitted April 2019).

This Yuasa YT19BL-BS (Exide 51913 equivalent) weights in at 5.7kg, https://cdn.tayna.com/datasheets/Yuasa-MF-YT19BL-BS-Datasheet.pdf



From the Exide Li-Ion Type list (page 7),  https://www.exide.com/eu/sites/default/files/2017-07/Motorsport%20-%20Battery%20Solutions.pdf can't see an alternative listed.

Exide also list some benefits of Li-Ion batteries and confirm that a special battery charger will be required.

Found this JMT Li-Ion battery at M&P (replacement for 51913),  https://www.ebay.co.uk/i/261449307307?chn=ps&mkevt=1&mkcid=28

Battery replacement OEM or Lithium Ion??

The specifications are, 7.17 Ah & 420 CCA, weighing 1.645 kg, https://www.elitemotorcycleservices.co.uk/51913-FP-JMT-Lithium-ion-battery

[David.]

Here is a BS Battery for £58.00, https://www.bikespeeduk.com/index.php?act=viewProd&productId=8568

[Our Gee]

Here is a BS Battery for £58.00, https://www.bikespeeduk.com/index.php?act=viewProd&productId=8568

If they are good enough for Fabio Quartararo and Jules Cluzel they must be good !!.

[gogs01]

When I had to replace the battery on my RT last year, I considered a Lithium battery.  I'm sure it would have been OK, but I  would be more comfortable fitting a lithium battery only when the bike comes with one as standard.


I chose a Motobatt AGM battery :  https://www.tayna.co.uk/motorcycle-batteries/motobatt/mbyz16hd/
Compared to the OE battery, it had higher Ampere Hours, higher Cold Cranking Amps, it was slightly smaller and it had four terminals, making connecting accessories easy.  I thought it was a good choice.


And almost half the price of a battery from my BMW dealer .....