Modern Vespa

So confused about a new battery sellection...please help me guys...
i have a 2017 gts300 and the current battery (yuasa ytx) is about to die...

Most probably In couple of weeks i have to buy the new one, but very confused about the alternatives.

my shortlist is;

Yuasa ytx12 (lead acid)
https://www.yuasabatteries.com/battery/ytx12-bs/

Motobatt ytx12 quad flex (agm, pre activated)
http://www.motobatt.com/MBTX12U

Skyrich HJTX12-FP (the only lion battery that i can find in my country)
https://www.skyrichbattery.com/product_info.php?products_id=576

Facts and constraints;

I have a charger which is claiming to charge all kind of 12v batteries including lion (NOCO GB3500)

I generally ride on spring or summer but never in winters

Any suggestions and comments are welcome because there is not so much details about how lifepo4 batteries (specially the skyrich ones) are performing on vespa gts300

I'm totally lost and looking for the answer of the followings;

Does skyrich has a BMS system for protecting itself from complee draining
Is my noco gb3500 is ok for charging lifepo4 batteries
I have a built-in gps tracker installed on my gts, which will most probably drain any kind of batteries
How is motobatt agm ones, they have a higher cca than the stock one (it is still lower than skyrich)

You want the AGM.

Non sealed batteries leak and the lion batteries are way to pricey and not the best for this application.

In the motobatt's site, the only supported gts300 models are 2010..not my 2017 gts is listed.
I thing it is about the position/location/order of the battery terminals. Because it is not same with the stock one (in yuasa terminal orders is L+ R- and in Motobatt L- R+) One more details confusing is the difference in the sizes, motobatt seems a little bit longer. I am not sure that it Will fit to my scooter

Yuasa Metric Dimensions:
150mm x 87mm x 130mm

Motobatt Dimensions (in / mm)
L: 5.94 (151) W: 3.43 (87) H: 5.12 (130)

The MotorBatt has 4 terminals, 2 on each side, So as far as Polarity you are set with the MotoBatt.

1mm longer you should not have any issues.

So guys.
Is motobatt a well-known brand and better chıice than yuasa?

In my country
motobatt ytx~70 usd.
Skyrich ytx ~110usd
yuasa ytx ~60 usd..

Motobatt is as good or better than Yuasa

I have all three brands in various rides. If you don't start your scooter for extended periods of time (and don't use a battery tender or similar), the Skyrich will discharge the least during periods of non-use, followed by the Motobatt (AGM), followed by the Yuasa.

I've only had the Skyrich for a bit over a year (OEM for the bike) and don't know how long it will last before requiring replacement. I've been through several Motobatts, and while they will discharge more slowly than my Yuasa's when not being used, I find they don't last as long as most of my Yuasa's before requiring replacement. YMMV

To be honest, in the beginning of my journey i was very willing to pay extra bucks for skrich and lithium. But i couldn't get the answers of my questions from their support and found many references about it.
After several attempts, i gave up to give them a chance...

My questions were:

Is there any built/in BMS systems in skyrich lifepo4 batteries for preventing overcharging/ full discharging

IF YES, is there any BMS reset button for recharging dead/fully drained battery back

Is charging skyrich ok with noco genius GB3500 battery tenders.

Is skyrich waterproof/shockproof. If yes does it have any certifications about it?

Is it ok Buying ytx14 instead of ytx12, because the sizes are relatively smaller than the stock one and YTX14 version of skyrich has more CCA (my bike ise gts300 2017 and stock is yuasa ytx)

Replaced a Yuasa with a Motobatt in my old GTS 300ie. My belief is that Motobatt is better, seems to hold a charge better in intermittent use.

Both the Yuasa and the Motobatt you list are AGM batteries. I prefer the Motobatt, and that is what I run in my scooters, including a '15 GTS.

I recently read that newer scooters with lots of electronic controls have a very small parasitic draw, which the LifePO4 batteries do not handle well, and will discharge more rapidly than lead-acid or AGM. However LifePO4 batteries have a much lower discharge rate when in storage, and should therefore work better in older, carbureted scooters with no parasitic draw.

Really? Surely the Yuasa is a standard maintenance-free wet-cell (or gel) battery? You have to add the acid, which comes separately.

This is what exactly i afraid to experience? Because i have a gps tracker with gsm installed on my bike.

In my vespa i have a mid-rack installed over the battery cover, and it is very difficult to remove/replace battery.

Do you guys think that is it a good idea to install a hidden battery cut off switch!?

My Skyrich is an "OEM" battery in a very high end Ducati with more electronics (traction control, ABS, cornering ABS, launch control, wheelie control, up/down quickshifter, etc.) than you can shake a stick at, including an immobilizer with an indicator light that flashes similar to my Vespa when turned off. It has crazy GPS/IMU/ECU tech, but the battery was likely chosen for it's lightness as the bike is one of the manufacturer's exercises in extreme weight savings. That said, the bike rarely gets ridden, is not on a trickle charger (lithium batt-friendly one they provided with the bike), and never fails to start after resting for a month or longer at times. Based on what you said, I would guess that it would have a parasitic draw similar or more to that of a modern Vespa, yet I haven't found this to be an issue thus far.

The Yuasa YTX12-BS battery available from my local scooter dealer here is a sealed for life battery. It is not shipped without acid. Likewise Revzilla identifies this battery as an AGM.

https://www.revzilla.com/product/yuasa-ytx12-bs-agm-battery

Thanks for the explanation my friend, if it is not difficult for you..it would be great if you can google and share your ducati's skyrich's exact model/picture..

Why i am asking it, because as far as i understand there ara two types of skrich batteries arround... one is (the box covered ones) are li on (and with buit in BMS System. And the second one (green one) is lithium phosphate (lifepo4) and no info/mention about the built-in BMS...

it seems that you are right Dooglas...i didn't know that yuasa ytx is a agm battery!!!

(Screenshot is from yuasa's official page)

Well I never! Thanks for the correction. I could have sworn I used to put acid in Yuasa batteries. (rummages) - Yes, many of the Yuasa AGM batteries do come with separate acid - the YTX14-BS which is the one I've used in the UK certainly does.

I believe it is this one:

https://www.skyrichbattery.com/product_info.php?cPath=10&products_id=594

I don't have my bike near me at the moment, but I will see if it the same battery that is spec'd for the similar 1199 Panigale (battery link above).

FYI, the YTX-12BS I recently installed in my Vespa and the YTX14-BS I recently installed in one of my big bikes both had acid packs (the puncture foil type) included with them. I had to prep them by adding the acid in both cases.

And the lithium will not last as long with equal amount of parasitic draw.
All the lithium battery I have looked at have less Rev Power Ratings. Most are less than half the Rev.
Skyrich does not even spec the Rev Power, what a joke
And there is a reason, because the reserve on lithium batteries suck

14 months and counting -- I'm not too worried about it for now. I generally don't buy lithium batteries for their longevity; I buy them for the weight savings. When the SkyRich is finished, I'll replace it with one from Speedcell Technologies. Made here in the USA by motorcycle enthusiasts who support our racing series.

You're not wrong Jim. I put a Yuasa battery in my old LX 150 and it was an "add acid" battery.