How does Axtra 3.6-amp battery charger compare to Battery Tender 3-amp battery charger?

The Axtra acts as both a 6-volt and a 12-volt charger. However, it can also provide a constant 3-amp battery tender witch, when set, will provide a continuous charge over a long period of time. The 3-amp battery tender only provides a continuous charge but cannot provide a 6 or 12-volt charge. If you do not have a charger, I would recommend the Axtra as is it can provide both aspects.

I'm using Axtra battery charger to maintain 2 batteries over the winter. Is this Battery Tender reliable as Axtra battery maintainer?

My experience with using the battery tender is nothing but good. Pretty much set it and forget it. No problems what so ever. Very easy to use, very well made, very reliable. I would for sure buy another one.

Is this over rated for motorcycles

If the battery is rated less than 30 amp hrs, I would say yes. The rule of thumb is the maximum charge rate should not excede 1/10 of the battery's Amp hr rating. E.g. 20 amp hr battery should not be charged at over 2 amps

Planning to connect black to black and red to red pigtail for car battery still inside car. Confused since not sure if that’s grounded. Pls confirm?

Yes, Red to Red (positive) and Black to Black (negative) is the correct connection. Why are you worried about ground on a 12 volt car battery?

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3 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0202-COS

Product ID: 21017525

Details

Brand
Battery Tender
Color
Black
Item Weight
1.4 pounds
Output Voltage
12
Product Dimensions
3.4"D x 11.1"W

⚡3 Amp Smart Charge Power

🔄Auto Float Mode Maintains Voltage

🔋Switchable 6V/12V Battery Compatibility

¥27720

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Description

🔋 Keep your ride ready—charge smart, drive fearless!

SAFETY FIRST ALWAYS - Spark-proof connection and reverse polarity detection guarantee a secure, worry-free charging experience every time.
PLUG PLAY CONVENIENCE - Compact, lightweight design with 11 feet of combined cord length lets you connect and forget—even in tight storage spaces.
EFFORTLESS POWER MANAGEMENT - Smart automatic charging with 3A output ensures your battery is fully charged then seamlessly switches to maintenance mode—no overcharging, no hassle.
REAL TIME STATUS MONITORING - Two-color LED indicators keep you informed of charging progress and automatically resume charging if voltage drops under load.
UNIVERSAL BATTERY COMPATIBILITY - Works flawlessly with lead-acid, AGM, gel, and lithium batteries, plus switchable 6V/12V modes for cars, SUVs, and trucks.

The Battery Tender 3 AMP Charger is a versatile, smart automatic battery maintainer designed for 6V and 12V automotive batteries including lead-acid, AGM, gel, and lithium types. Delivering a steady 3 amp charge, it fully charges your battery then switches to float mode to prevent overcharging. Its compact design, safety features like spark-proof connection and reverse polarity detection, plus real-time LED status indicators make it the go-to solution for keeping cars, SUVs, and trucks battery-ready during long idle periods. Backed by a 5-year warranty and lifetime support, it’s the trusted choice for proactive vehicle owners.

Specifications

ASIN	B016S7NHWQ
Amperage	3 A
Best Sellers Rank	#2,436 in Automotive ( See Top 100 in Automotive ) #18 in Battery Chargers
Brand	Battery Tender
Built-In Media	Funnel
Color	Black
Connector Type Used on Cable	Ring Terminal and Alligator Clip Combo
Current Rating	3 A
Customer Reviews	4.7 4.7 out of 5 stars (2,351)
Global Trade Identification Number	00734357220209
Input Voltage	120 volts_of_alternating_current
Item Dimensions D x W x H	3.4"D x 11.1"W x 9.4"H
Item Type Name	Battery Chargers
Item Weight	1.4 pounds
Manufacturer	Deltran
Mfr Part Number	022-0202-COS
Model Number	022-0202-COS
Number of Items	1
Number of Ports	1
Output Voltage	12 volts_of_direct_current
Specification Met	US FCC, UL
UPC	734357220209 713002505359
Unit Count	1 Count
Warranty Description	5 Year Manufacturer Warranty

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¥27720

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

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