Bren-Tronics BTC-70791-MR, Mid-Rate X90 AC Charger

(No reviews yet) Write a Review


  • The pricing on our website is subject to change without notice.
  • Several manufacturers and suppliers are modifying pricing up to the point of shipment.
  • We apologize for this inconvenience, but unfortunately this is beyond the control of StorTronics.

Distributor pricing, call (248) 912-1200


Bren-Tronics BTC-70791-MR, Mid-Rate X90 AC Charger


Dedicated single-station charger that will charge the BB-390B/U, BB-2557/U and the BB-2590/U batteries.

  For Volume Pricing email us at or call us today at 248-912-1200. Thank you!

BTC-70791-MR Details

Details for the Bren-Tronics BTC-70791-MR Charger
  • Dedicated single-station charger that will charge to 16.5V each battery section of the following:
   • BB-2590/U (BT-70791A, BT-70791BK or BT-70791CK) in 5.5 hours or less
   • BB-390B/U (BT-70790B) in 10.5 hours or less
   • BB-2557/U (BT-70757BK) in 2.5 hours or less*
   • Powered from 100-240Vac, 200VA, 50/60Hz.
   • Simple solution for the user who does not require a bulk or multi-station charger.
   • 6ft IEC C7 AC Power Cord with US connector (BTP-592212-US) included with charger.
   • Optional AC Power Cord configurations available
   • BTP-592212-EU (EU Terminal)
   • BTP-592212-UK (UK Terminal)
   • BTP-592212-AU (AU Terminal)
   • RoHS compliant
  *  Additional higher capacity versions of the BB-2590/U and BB-2557/U are available and can be charged with slightly longer charge times.



  Length: 3.3 in (84 mm)
  Width: 2.2 in (56 mm)
  Height: 2.0 in (51 mm)
Power Supply:
  Length: 5.2 in (132 mm)
  Width: 2.3 in ( mm)
  Height: 1.2
AC Input Cable: 36.0 in (914 mm)
Supply to charger Cable: 53.0 in ( mm)
Weight: 1.1 lbs.
  SKU: BTC-70791-MR
  Case Materials/Colors: High Impact ABS / Black
  Power Requirements: 100V-240Vac, 200VA, 50/60Hz
  Storage Temperature: -40°C to +70°C (-40°F to +158°F)
  Operating Temperature: -20°C to +50°C (-4°F to +122°F)


Custom Battery Assemblies

Empowering Innovation, Crafting Tailored Power Solutions using StorTronics expert Design and Engineering Team!

  StorTronics specializes in delivering cutting-edge Custom Battery Assemblies, what sets us apart is the diverse experience of our dedicated Design and Engineering staff.
  We take pride in empowering innovation by seamlessly integrating our expertise to craft tailored power solutions.
  From concept to execution, our team works collaboratively to understand the unique requirements of each project, ensuring precision, efficiency, and reliability in every custom battery assembly we produce.
  With a commitment to excellence, we not only meet but exceed expectations, providing a seamless fusion of design ingenuity and engineering prowess to power your innovations.

For custom assemblies made using the Saft LS14250, contact us or complete Custom Design forms below.

For your battery design and system needs, please contact our engineering staff at (248) 912-1200 or download our Custom Secondary/Rechargeable Battery Pack Design Form and send it to

For your battery design and system needs, please contact our engineering staff at (248) 912-1200 or download our Custom Primary/Rechargeable Battery Pack Design Form and send it to

View AllClose


*  StorTronics is certified to ship Lithium Batteries, all Lithium products shipped using an Expedited Service (Overnight, 2nd Day &

    3 Day Shipments) will be shipped ONLY using Federal Express. There will be no exceptions!

*  All Lithium batteries or battery packs are classified as a Hazardous Material and will be subject to an additional "Hazardous
    Shipping Fee" (HAZMAT Fee).

*  The total shipping charges indicated in your shopping cart may need to be adjusted after you have submitted your order.  

*  A HAZMAT fee will be charged for All Expedited shipments.
*  A Handling Fee will be charged when using a customers FedEx account, this fee will be determined after you have placed
    your order.

*  A representative will contact you with the adjusted charges for your shipment.