SKU: 16730898665

Dual Pro SS4 4 Bank Battery Charger w/2 Bank B.O.S. [SS4/BOS12V2]

Sale price$387.43 Regular price$430.48
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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3

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Description

Dual Pro SS4 4 Bank Battery Charger w/2 Bank B.O.S. [SS4/BOS12V2]SS4 4 Bank Battery Charger with 2 Bank B. O. S. This kit includes Dual Pros B. O. S. Battery Optimization System 12V 2 Bank (PN: BOS12V2) and Dual Pros Sportsman Series Battery Charger 40A 4 10A Banks 12V 48V (PN: SS4). B. O. S. Battery Optimization System 12V 2 Bank B. O. S. actively shuttles energy between batteries to keep the pack balanced, increasing battery strength and longevity. Batteries in a pack will become out of balance and the pack is

SS4 4 Bank Battery Charger with 2 Bank B.O.S.

This kit includes Dual Pro’s B.O.S. Battery Optimization System - 12V - 2-Bank (PN: BOS12V2) and Dual Pro’s Sportsman Series Battery Charger - 40A - 4-10A-Banks - 12V-48V (PN: SS4).

B.O.S. Battery Optimization System - 12V - 2-Bank

B.O.S. actively shuttles energy between batteries to keep “the pack” balanced, increasing battery strength and longevity.

Batteries in a pack will become “out of balance” and the pack is only as good as its “weakest link”. In watercraft applications, this is further compounded when the trolling motor battery is used for peripherals and/or to assist the cranking battery.

B.O.S. actively shuttles energy as needed between batteries wired in series to ensure equal voltage before, during, and after charging.

B.O.S. keeps packs balanced, enabling maximum performance, and quadruple run time on the water.

Premature battery failure due to an unbalanced pack has been, unfortunately, accepted as the ‘norm’ for decades. The B.O.S. answers this call with a BSAP-24 algorithm that can accurately predict and select the battery that needs additional energy to match the other batteries within the pack. This simultaneously and successfully extends the life of each battery in the pack, as well as increasing run times.

Features:

  • Available in 6V, 8V, and 12V configuration
  • Up to six batteries in a series
  • Battery Selection and Prediction (BSAP-24) algorithm
  • Less than 1mA sleep mode
  • Transfer rate up to 7.5A
  • Self-powered
  • Any type of battery chemistry

Used in Any Application Where Batteries Are in Series:

  • Marine
  • Golf
  • Industrial
  • Aerial Equipment
  • Solar Power
  • Electrical Vehicles
  • Communications
  • Defense/Military

Sportsman Series Battery Charger - 40A - 4-10A-Banks - 12V-48V

Dual Pro’s customers asked for a series of chargers that were smaller, lighter, and economically affordable. The Sportsman Series of chargers answers these needs. This line of chargers is designed for all types of battery applications. Sportsman chargers have all the safety and reliability features that have made PRO Charging Systems chargers the #1 choice of most boat manufacturers, dealers, and over 750,000 customers across the country. Advanced microprocessors and LED readings make the units even easier to use.

Battery Charging System Designed for Use On Land and in Fresh and Salt Water:

  • The “Green” Charger: Totally “Repairable” Not a Throw-Away
  • Unmatched Performance, Reliability, Safety and Quality
  • TROUBLE FREE – Just Plug It In and Forget It!
  • Join Over 750,000 of Dual Pro’s Satisfied Customers!
  • Fully Automatic and Waterproof

Features:

  • Approved for Wet Cell and AGM batteries
  • Models also available for Gelled Electrolyte batteries
  • Designed for use in fresh and saltwater
  • DeltaVolt® Intuitive Charging Technology
  • Waterproof, dependable, rugged construction
  • Independent outputs
  • Fully automatic/multi-stage charging
  • Zero spark technology
  • Battery maintenance mode
  • On-board diagnostic codes
  • Temperature-compensated
  • Advanced microprocessor controlled
  • Battery systems available: 12V – 48V
  • LED lights indicate the state of charge
  • Reverse polarity protected
  • No installation restrictions
  • FCC Parts A & B interference-compliant
  • DC charge cables = 5' AC power cord = 3'
  • Approved and meets ISO 8846 Marine standards
  • Ignition protected (US Coast Guard 33 CFR 183.410

May Be Used in Many Types of Sporting Applications Including:

  • Inland Watercraft
  • Salt Water Watercraft
  • Motorcycles
  • Golf Carts
  • Utility Vehicles

Specifications:

  • Charger Input - Voltage: 120v
  • Charger Output - Amps: 40a
  • Charger Output Voltage: 12/24/36/48v
  • Charging Banks: 4
  • Portable: No
  • Box Dimensions: 3"H x 6"W x 9"L WT: 25.8 lbs

Quick Guide (pdf)
Owner's Manual (pdf)
Brochure (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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: 16730898665

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Trea
New York, US
★★★★★ 5
Perfect!
Color: White
Smooth clean shave 👏🏽 good quality no skin irritation
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
J
jenny baby
Alexandria, US
★★★★★ 5
Clean good
I was pleasantly surprised by how easy this trimmer is to handle. The design feels lightweight in my hand, and the gray color actually looks really sleek on my counter. The blades work smoothly without pulling, and it gives a neat trim without irritation. I like that it’s simple to clean and doesn’t take up much space in my drawer. The noise level is low enough that it doesn’t feel distracting, and the on/off button is placed in a way that makes it comfortable to use. It’s a straightforward tool that does exactly what I need, and it’s made my routine a lot quicker and more convenient.
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Reviewed in the United States on September 22, 2025
S
Susan
Birmingham, US
★★★★★ 5
Perfect size for my travel bag
I threw this trimmer in my bag for a weekend trip. It doesn’t take up much space, and it was charged before I left. Ended up using it at the hotel, and it was super quick to set up. I just trimmed, rinsed it under the sink, and done. The battery lasted the whole trip, I didn’t even bother packing the charger. I liked that it didn’t make a mess, which is usually my issue with razors when I’m away from home. It’s small and easy to hold, I didn’t feel like I needed a whole setup to use it. Now I actually keep it in my travel bag so I don’t forget next time. For trips where space is limited, this turned out to be a good little tool to have.
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Reviewed in the United States on September 15, 2025
F
Fabian
Lexington, US
★★★★★ 5
Quiet but Strong
The sound level surprised me. I expected a louder buzz, but it’s much quieter, which makes using it less stressful. The size is small enough to maneuver easily, but it doesn’t sacrifice strength. Even with thicker hair, it trims without pulling. That’s usually my main concern with electric tools, but this one feels secure and safe. Another thing I enjoy is how light it feels in my hand. I used it on my arms, legs, and bikini line, and I didn’t have to grip tightly. The design makes it simple to hold and move around curves without nicking the skin.
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Reviewed in the United States on September 12, 2025
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TT
Massapequa, US
★★★★★ 5
Great Trimmer for Sensitive Areas
I’ve been really happy with this Dermave bikini trimmer. It’s compact, easy to handle, and works well on delicate areas without causing nicks or irritation. The 2 in 1 feature is great. I use the smaller head for facial touch ups and the larger one for bikini and body areas. The ceramic blade glides smoothly and feels safer than traditional razors. I like that it’s waterproof, so I can use and rinse it in the shower. The charging dock keeps it neat and charges it quickly. Battery life has been solid so far. It’s also pretty quiet, which is a bonus. Whether you’re maintaining between waxes or just prefer trimming, this is a reliable and gentle option.
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Reviewed in the United States on September 9, 2025

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