Does this require special charger? Can this work with stock alternator?

Hello Paul,The battery is designed to work with the existing / stock alternator. The manufacturer suggests the linked charger below:https://www.amazon.com/OptiMATE-Lithium-TM-291-10-step-charger-tester-maintainer/dp/B007GRGUJU/ref=sr_1_1?m=A2U296R8AN80PO&s=merchant-items&ie=UTF8&qid=1493397257&sr=1-1&keywords=TM-291

Will to fit 2023 ktm 1290 adventure r

No, you need the ETX24C for the 2023 KTM 1290 Adventure R and you can find it here on AmazonL: https://www.amazon.com/dp/B019ENBVWY

What is the polarity of this battery as well as the dimensions

Hello H-D rydr4evr,If you are looking at the battery label (as shown in the image) the positive terminal is on your right. Also, the terminals on both the ETX36C & the ETX24D are in the center position vs on the edge of the battery. Because of this design, you can turn the batteries around if needed.The dimensions are:Length: 5.91" (150 mm)Width: 3.39" (86 mm)Height: 4.53" (115 mm)https://www.amazon.com/EarthX-Eco-Friendly-Lithium-Motorcycle-Management/dp/B019EP9FW0/ref=cm_cd_al_qh_dp_t

What are the dimensions of this battery

Hello H-D rydr4evr,If you are looking at the battery label (as shown in the image) the positive terminal is on your right. Also, the terminals on both the ETX36C & the ETX24D are in the center position vs on the edge of the battery. Because of this design, you can turn the batteries around if needed.The dimensions are:Length: 5.91" (150 mm)Width: 3.39" (86 mm)Height: 4.53" (115 mm)https://www.amazon.com/EarthX-Eco-Friendly-Lithium-Motorcycle-Management/dp/B019EP9FW0/ref=cm_cd_al_qh_dp_t

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EarthX ETX36C Eco-Friendly Lithium Motorcycle Battery with Built-in Battery Management System

EarthX ETX36C Eco-Friendly Lithium Motorcycle Battery with Built-in Battery Management System

Product ID: 34959050

Details

Battery Cell Composition
Lithium
Brand
EarthX
Item Weight
3.9 Pounds
Manufacturer
EARTHX
Size
6mm
UPC
700310073595

⚡2-3X faster charging

🏍️Up to 80% lighter weight

🛡️Built-in over-discharge protection

2758.12 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your ride with EarthX: Faster, lighter, smarter!

UNMATCHED DURABILITY - Engineered in the USA with a 2-year full coverage warranty—no proration, no hassle.
SPEEDY CHARGING POWER - Charge 2-3X faster than traditional lead acid batteries for instant readiness.
SMART BATTERY MANAGEMENT - Built-in over-discharge protection extends battery life and safeguards your investment.
LIGHTWEIGHT PERFORMANCE BOOST - Shed up to 20 lbs on touring bikes—feel the difference in every ride.
ECO FRIENDLY MAINTENANCE FREE - Non-toxic, spill-proof, and zero water addition needed—ride green and worry-free.

The EarthX ETX36C is a premium eco-friendly lithium motorcycle battery designed to replace multiple Yuasa models. It offers 2-3 times faster charging, up to 80% lighter weight for enhanced bike performance, and built-in over-discharge protection to maximize lifespan. Assembled in the USA, it comes with a 2-year full coverage warranty and includes terminal adapters for versatile installation. This maintenance-free, non-toxic battery delivers superior voltage (13.2V) and reliability, making it the smart choice for professional riders seeking performance and sustainability.

Specifications

ASIN	B019EP9FW0
Battery Type	Lithium
Best Sellers Rank	#2,572,810 in Automotive ( See Top 100 in Automotive ) #7,441 in Powersports Batteries
Brand Name	EarthX
Compatible with Vehicle Type	Passenger Car
Customer Reviews	4.4 4.4 out of 5 stars (22)
Item Weight	3.9 Pounds
Manufacturer	EARTHX
Manufacturer Part Number	36C
Model Number	36C
Size	6mm
UPC	700310073595
Voltage	13.2 Volts

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