SKU: 2255910317

Newmar 1-3-70 Battery Isolator [1-3-70]

Sale price$100.80 Regular price$112.00
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Ships within 48 hours · Estimated delivery Jul 28 - Aug 2

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Description

Newmar 1-3-70 Battery Isolator [1-3-70]1 3 70 Battery Isolator This heavy duty isolator allows charging multiple batteries automatically from one or two alternators and prevents the discharge or dumping of one battery into another. Each battery is charged according to its need without overcharging and is rated for 12 , 24 , or 36 volt negative ground DC systems. Features: Conservatively rated diodes and a rustproof anodized aluminum heat sink case. Heavy duty construction Rated for systems

1-3-70 Battery Isolator

This heavy-duty isolator allows charging multiple batteries automatically from one or two alternators and prevents the discharge or ‘dumping” of one battery into another. Each battery is charged according to its need without overcharging and is rated for 12-, 24-, or 36-volt negative ground DC systems. 

Features:

  • Conservatively rated diodes and a rustproof anodized aluminum heat sink case.
  • Heavy-duty construction
  • Rated for systems up to 48 volts DC, negative ground
  • Rust-proof anodized aluminum case
  • Stainless steel mounting hardware is provided
  • Protective covers are provided for terminals

Specifications:

  • Alternator Sources: 1
  • Battery Bank: 3    
  • Max. Amperage Input Capacity: 70
  • Stud Terminal Size: 6mm    
  • Dimensions (L x W x H): 3.25 x 4.5 x 3.1 inches
  • Weight: 2 lbs.
  • Operating Temperature: -40 to +80 degrees
  • Duty Cycle: Continuous rating to 50 degrees C Derate linearly to 70% @ 80 degrees C.
  • Temp. Rise: 5 degrees C at full rated current (mount vertically for optimum cooling)
  • Voltage Drop: 0.7V @ 50% load, 0.9V @ full load

*Note: These battery isolators are not compatible with self-exciting alternators. The alternator must have an external excitation lead. Please consult the manufacturer of your alternator if you are unsure of your configuration

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 2255910317

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4.4 ★★★★★
Based on 21 reviews
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Anita G Doran
Bozeman, US
★★★★★ 3
Legs curl up, panty liners don't stick, front and back are cut exactly the same.
I wear a pants size 8, and purchased an XL in these because I don't like tight underwear. They feel good, and fit well -- not baggy and not tight. However, the legs do curl up, which I might have expected if they were tight, but they're not. Panty liners stick at first, but not all day. And although there is printing on the inside back to provide a clue about what is supposed to be front vs back, there is no difference in the cut. The waist hits a bit lower in the back (on me) than in the front, which is not a deal killer, but, REALLY?? I'll keep these, but will keep looking for a better fit, and legs that don't curl up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 25, 2022
M
Verified Purchase
Margaret L Fulmer
Chelsea, US
★★★★★ 5
But - you can’t always figure out the back or front
Easy to wash and a good fit.
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Reviewed in the United States on July 27, 2025
C
Verified Purchase
Cliente de Amazon
Battle Creek, US
★★★★★ 5
Excelentes
Color: Set8-4, Size: XX-Large
Lindos, cómodos y el materia no se marca sin ser delgados
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 10, 2026
V
Verified Purchase
VJR
Waukegan, US
★★★★★ 5
Great non plastic shirt for exercise and daily wear
Color: Claret, Size: Large
Soft and comfortable. Breathable material for exercise. Fits well (L, 5'3",150lb). Wish it was and inch or 2 longer
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Reviewed in the United States on May 27, 2026
D
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DMR
Lowell, US
★★★★★ 5
Super nice shirt!
Color: Black, Size: Small
I actually bought this shirt to wear under zip-up hoodies. It's super soft and cozy. It washes up great and is very durable. I just ordered two more in different colors! A great value - perfect!
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Reviewed in the United States on March 16, 2026

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