What Bren-Tronics does

Bren-Tronics, operating as Bren-Tronics Defense LLC since its July 2024 acquisition by EnerSys (NYSE: ENS) for $208 million, is a 50-year-old specialty manufacturer of military-grade rechargeable batteries and intelligent charging systems. Founded in 1973 by Vietnam-era veteran Leo Brenna, the company has evolved from primary (one-time use) batteries through nickel-cadmium and nickel-metal-hydride chemistries to its current portfolio centered on lithium-ion technology across multiple form factors, including the BB-2590/U, BB-2557/U, BB-2847A/U radio batteries, the 6T vehicle battery family, and the Conformal Wearable Battery (CWB). The company pioneered the U.S. military's first rechargeable batteries and first military smart charger for Li-ion batteries, with products designed, manufactured, and tested in the USA to MIL-PRF-32052/1 and MIL-PRF-32565C specifications.

The company's product portfolio spans rechargeable and non-rechargeable batteries, bulk and desktop chargers (ABC/ABC Plus), vehicle-mounted chargers (VMC/VMC Lite/VMC Mini), soldier-portable chargers (SPC), expeditionary foldable solar-compatible chargers (FLEX with MPPT), and a full accessories line (adapters, cables, peripherals). Bren-Tronics' BB-2590/U is integrated into over 71 different military device platforms including SINCGARS, AN/PRC-117, AN/PRC-148/152/153/163 radios, UGVs/UAVs, jammers, and thermal weapon sights. The company maintains ~250 employees across 100,000 square feet of manufacturing and engineering facilities at its Commack, NY headquarters, with international sales supported through BIS SARL.

Revenue is generated almost exclusively through B2B/government channels via direct enterprise sales to the U.S. military, allied militaries, and defense contractors, supplemented by the BT-Direct e-commerce platform for expedited U.S. and Canada orders. Pricing is not publicly disclosed and is handled through quotes and contracts. The $1.25 billion U.S. Army CWB Program contract (awarded 2021) is the dominant revenue anchor, with the company positioned as the world's largest supplier of rechargeable batteries for the military. Following the EnerSys acquisition, Bren-Tronics continues to operate under its brand as the specialty defense batteries division, with new product launches (Hawker ARMASAFE iON-X 6T, September 2025) extending its addressable market into higher-capacity military vehicle electrification.

Name

Bren-Tronics

Legal name

Bren-Tronics Defense LLC

Website

https://bren-tronics.com

Company type

Private

Founded year

1973

Operating status

Acquired

Headcount range

251–500 employees

Short description

Bren-Tronics is a U.S. military-grade rechargeable battery and intelligent charging systems manufacturer, acquired by EnerSys for $208M in 2024. It supplies lithium-ion batteries, chargers, and accessories to the U.S. Army and allied militaries under MIL-PRF specifications.

Ownership category

akta.pro rank

Product category

Military Batteries

NAICS

Battery Manufacturing (335910), Battery Manufacturing (33591)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB)

akta.pro secondary industries

Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA), Automotive Batteries & 12V/Low-Voltage Energy Storage Manufacturing (IMACAJAJ), Battery Management Systems (BMS) & Pack Electronics Manufacturing (EUAFABAJ)

Keywords

• Military battery systems
• Rechargeable lithium-ion batteries
• Intelligent battery chargers
• Soldier wearable batteries
• Defense power solutions

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Military Battery Sales: Primary revenue from manufacturing and selling rechargeable batteries for military radios, vehicles, drones, robotics, directed energy weapons, remote sensors, and other defense applications. Products include BB-2590/U, BB-2557/U, BB-2847A/U, AN/PRC-148, AN/PRC-152, Conformal Wearable Battery, and 6T vehicle batteries.
2. Battery Charger Systems: Sales of intelligent battery charging systems including bulk chargers, desktop chargers, single battery chargers, vehicle-mounted chargers (VMC, VMC Lite, VMC Mini), and soldier portable chargers. Chargers support multiple battery types with adapter systems.
3. Accessories and Adapters: Sales of adapters, cables, peripherals, and complementary accessories including NATO cables, USB chargers, state of charge indicators, and battery health meters.
4. Custom Solutions and Engineering Services: Custom battery and power solutions development from rapid prototyping through testing to production for specialized military and industrial applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

Bren-Tronics manufactures and sells military-grade rechargeable batteries (lithium-ion, nickel metal hydride, nickel cadmium) and intelligent charging systems for U.S. and allied military applications. Its product portfolio covers radio batteries (BB-2590/U, BB-2557/U, BB-2847A/U, AN/PRC-148/152/153/163), vehicle batteries (6T format), Conformal Wearable Batteries for soldiers, drone and robotics power solutions, and accessories. The company also provides custom battery engineering and rapid prototyping services for specialized defense applications.

Product overview

Bren-Tronics is a military battery and charging systems company providing expeditionary power solutions for over 50 years. The product portfolio centers on three core categories: rechargeable lithium-ion batteries (including BB-2590/U, BB-2557/U, BB-2847A/U, and radio-specific batteries like AN/PRC-148 and AN/PRC-152), charging systems (ABC/ABC Plus chargers, FLEX foldable field chargers, VMC/VMC Lite/VMC Mini vehicle-mounted chargers, and SPC Soldier Portable Chargers), and accessories (adapters, cables, and peripherals). The company also offers specialized lines for Conformal Wearable Batteries (CWB) for soldier systems and drone power solutions. In September 2025, EnerSys launched Hawker ARMASAFE iON-X 6T lithium-ion vehicle batteries under the Bren-Tronics business segment. Bren-Tronics operates as a subsidiary of EnerSys following the $208M acquisition completed in July 2024, serving as the specialty defense batteries division.

Differentiator

Problem solved

Functional benefit

Products and services

• BB-2590/U Rechargeable Lithium-Ion Battery (BT-70791CG) High-performance rechargeable lithium-ion battery (294 Wh, 9.9 Ah) designed to MIL-PRF-32052/1 specifications for U.S. and allied military communications gear (SINCGARS, AN/PRC-117), robots, jammers, and other defense applications.
• BB-2557/U Rechargeable Lithium-Ion Battery (BT-70757BK) Rechargeable lithium-ion battery (75 Wh) built to run 14% longer than the previous BT-70757 version, certified by DOD for military use in unmanned ground/aerial vehicles (UGV/UAV), TACFIRE, and REMBASS systems.
• BB-2847A/U Rechargeable Lithium-Ion Battery (BT-70747BK) First lithium-ion battery approved for combat operations (7.1 Ah, 7.2V nominal), SMBus v1.1 / SBData v1.1 compliant, UN/DOT 38.3 rated at 56 Wh, used in AN/PRM-34 radio sets, AN/PRS-7 mine detectors, and AN/PAS-13 thermal weapon sights.
• MBITR AN/PRC-148 Rechargeable Lithium-Ion Battery (BT-70716BG) 6.8 Ah rechargeable lithium-ion battery for AN/PRC-148 variants with Single Wire DQ communication interface, UN/DOT 38.3 rated at 73 Wh, compatible with WAVE radio systems.
• ABC / ABC Plus Universal Battery Charger Universal desktop battery charger system supporting multiple military battery types via adapters; ABC Plus model delivers 2000W output for rapid charging across radio, vehicle, and wearable battery families.
• FLEX (Foldable Lightweight Expeditionary) Chargers Portable foldable solar-compatible charger series (2-4 panel configurations) with Maximum Power Point Tracking (MPPT) for efficient solar and DC charging of BB-2590/U, BB-2557/U, AN/PRC-148/152/163, and Conformal Wearable Batteries in field conditions.
• VMC / VMC Lite / VMC Mini Vehicle-Mounted Chargers Vehicle-mounted battery charger series for military vehicles, capable of charging up to 8 batteries simultaneously with LED status indicators and field-upgradeable firmware via USB or RS232; VMC Lite is a compact reduced-size variant.
• SPC (Soldier Portable Charger) Portable battery charger for field or depot use, capable of charging up to 8 batteries (2 simultaneously with 6 in queue) across a wide range of military communication and electronics batteries using designated adapters; CE/UKCA compliant variants available.
• Conformal Wearable Battery (CWB) Lightweight wearable battery system (148 Wh capacity) designed for soldier-worn equipment, integrating with soldier gear as conformal body-worn power; supports the $1.25B U.S. Army CWB program and meets MIL-PRF-32565C requirements.
• Hawker ARMASAFE iON-X 6T Military Vehicle Batteries Military vehicle batteries using rechargeable lithium-ion technology in 6T form factor, available in 105 Ah and 162 Ah models at 24V; designed for tactical/combat vehicle starting, silent watch, robotics, unmanned vehicles, and weapon systems; meets MIL-PRF-32565C requirements.
• Ultra High Capacity 6T Battery (BT-70939M) Advanced lithium-ion 6T-format military vehicle battery with ultra high capacity, designed for demanding military vehicle applications; introduced in 2015 and updated through multiple iterations.
• Drone Power Solutions Rechargeable battery and power solutions specifically designed for unmanned aerial vehicles (drones), combining high power and capacity for demanding UAV applications.
• BT-Direct Online Ordering Service Premium quick turn-around direct purchasing service for expedited battery and charger needs in the USA and Canada, with online quote request and shopping cart functionality.
• Custom Battery Engineering and Prototyping Services Custom battery and power solutions development services, from rapid prototyping through testing to production, for specialized military and industrial applications where off-the-shelf products do not suffice.

Quantifiable outcome

• BB-2557/U runs 14% longer than previous BT-70757 version while being built tougher
• +3 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Market position

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/brentroninc
• LinkedInlinkedin.com/company/bren-tronics-inc.

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Bren-Tronics