Can this be connected to a car battery then to a lithium battery pack for the purpose of keeping the lithium’s charged? Lithium for car amps

No. Lithium batterie$ need a $pecific charge controller. ($$$)

does the blue light stay on

The blue light indicates that the primary battery is connected to the alternate battery and charging. This happens when (1) the vehicle's ignition is on and (2) the primary battery is being measured at 14V or higher. Also, after turning off the ignition there is a delay of less than a minute before the batteries are isolated. The blue light will remain on until completed

i bought this three months ago. the battery continues to drain. always stays at 11.7 v. i dont know if thing is broken or what. what do i do?

I would not continue to let the batteries drain to 11.7 Volts. Never let you battery bank get lower then 11.9 Volts. I would replace your battery isolator.

Can I use this with a 200 amp alternator or will it hurt the unit

This unto will work fine. Your alternator may be rated for 200 amps. That rating is right before is burns up. There are other loads in your car that will take power while it is running. There is no way your alternator will push 200 amps to your battery.

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WirthCo Battery Doctor 20092 Dual Battery Isolator, 125/150 Amp, 12 Volt, Electronic Parallel Charging with Manual Override, IP62 Water Resistant, 4 x 4 x 2 Inch

Product ID: 7065661

⚡125A continuous charging power

💧IP62 water-resistant housing

🔋Dual battery isolation & management

845.25 DT

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Description

🔋 Power your journey with smart dual battery control — never get stranded again!

POWER PACKED CHARGING - Delivers 125A continuous and 150A peak charging to keep your auxiliary battery ready for action.
COMPACT VERSATILE DESIGN - Sleek 4x4x2 inch electronic isolator fits anywhere with multiple mounting options and a lightweight build.
INSTANT JUMP START OVERRIDE - One push parallels batteries to jump-start your engine from the auxiliary battery when you need it most.
BUILT TOUGH FOR ANY ADVENTURE - IP62 water resistance plus surge and overcurrent protection make it perfect for marine, off-road, and daily drives.
SEAMLESS DUAL BATTERY CONTROL - Automatically isolates your starting battery while charging the auxiliary, ensuring no power drain or cross-discharge.

The WirthCo Battery Doctor 20092 is a compact, electronic dual battery isolator designed for 12V systems, delivering 125A continuous and 150A peak charging. It automatically manages and isolates your starting and auxiliary batteries, includes a manual override for jump-starting, and features IP62 water resistance plus surge and overcurrent protection. Ideal for vehicles requiring reliable auxiliary battery charging in rugged or marine environments.

Specifications

ASIN	B0058SGDFK
Amperage	150 A
Best Sellers Rank	#196,466 in Automotive ( See Top 100 in Automotive ) #744 in Battery Chargers
Brand	WirthCo
Customer Reviews	4.5 4.5 out of 5 stars (699)
Date First Available	June 30, 2011
Item Weight	15.2 ounces
Item model number	1213.1241
Manufacturer	WirthCo
Manufacturer Part Number	010054200929
Model	Battery Isolator, 125A
OEM Part Number	20092
Product Dimensions	5.1 x 5.7 x 2.3 inches
Voltage	12 volts

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845.25 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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