# Hulkman Sigma 5 5A 6V/12V Battery Charger

Battery: The Hulkman Sigma 5 is a 5A charger and maintainer for compatible 6V and 12V lead-acid batteries and 12V LiFePO4 batteries. It requires an external AC outlet, so it is a charger and maintainer rather than a portable jump starter.

- [Original product page](https://best-deals.pro/product/hulkman-sigma-5-5a-battery-charger)
- [View offer](https://best-deals.pro/visit/hulkman-sigma-5-5a-battery-charger)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Hulkman
- Model: Sigma 5
- Category: Cars & Motorcycles > Vehicle Accessories
- Price: 69.99 USD
- Previous price: 99.99 USD
- Discount: 30%
- Price checked: 2026-11-14T05:48:24.232Z
- Rating: 4.6 / 5
- Reviews: 491

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Offers charging, maintenance, trickle charging and float charging functions for supported battery types.
- The LED display is claimed to show battery status, voltage, charging mode and incorrect operations.
- Manufacturer describes automatic cutoff after full charge and restart when battery voltage drops.
- Loading Mode is claimed to work with batteries as low as 0.3V. Repair Mode is specified for batteries over 2V.

## Pros

- Supports both 6V and 12V lead-acid batteries, plus 12V LiFePO4 batteries.
- The stated 5A output in 12V mode and 1.8A output in 6V mode cover different small-vehicle battery needs.
- Display reports charging information and operating errors, according to the listing.
- Package listing includes both clamps and eyelets, plus a bracket and screws.

## Cons

- This is not a jump starter and needs an external AC source to operate.
- The 6V output is 1.8A, lower than the 5A output specified for 12V mode.

## Specifications

### Identity
- Brand: Hulkman
- Model: Sigma 5
### Dimensions and installation
- Dimensions listed: 3.07"D x 5.51"W x 1.89"H
- Weight listed: 856 g
### Charging
- Output voltage and current, 12V mode: 12V DC, 5A
- Output voltage and current, 6V mode: 6V DC, 1.8A
- Battery capacity range, 12V mode: 15-120Ah
- Battery capacity range, 6V mode: 6-50Ah
- Supported battery chemistries: 12V / 6V lead-acid and 12V lithium batteries \(LiFePO4\)
- Lead-acid types listed: flooded, gel, maintenance-free, AGM, SLA, and VRLA
- Charging stages: 9-stage
- Display: 3.2-inch LED display
### Construction and connection
- Protection rating claimed: IP67
- Cable connector type: Alligator Clamps
- Input voltage listed: 100-240V AC, 50Hz, 85W

## Before you buy

- The listing gives inconsistent 12V capacity ranges: one feature states 15 to 121Ah, while detailed product copy states 15-120Ah. It also describes the warranty as both a 2-Year Hassle Free Warranty and a 3-Year Limited Warranty or 3-year customer service. Confirm the selected listing's capacity range and warranty terms before purchase.

## In the box

- Battery clamps \(1\) (Included)
- Battery eyelets \(1\) (Included)
- Mounting screws ×1 (Included)
- Power adapter ×1 (Included)
- User manual ×1 (Included): Warranty duration conflicts with the separately stated 2-year warranty. Confirm terms.

## A good fit for

- Owners maintaining compatible car, motorcycle, ATV or other small-vehicle batteries near an AC outlet.
- Buyers needing a charger for both 6V and 12V lead-acid batteries, as well as 12V LiFePO4 batteries.
- Users who want a screen showing battery status, voltage and charging mode.

## Less suited to

- Drivers seeking a portable jump starter or a charger that runs without an AC outlet.
- Buyers needing higher charging current than the specified 12V 5A or 6V 1.8A outputs.

## Customer feedback

Customer feedback highlights perceived build quality, a readable display and versatility, with some customers also describing good value. Reports are mixed on charging time and connectivity. For buyers maintaining small compatible batteries, the screen and multi-chemistry support may be useful, but the listed 5A 12V output is modest and customer feedback includes reports of slow charging.
- Positive themes: Customers describe the charger as well-made and its display as easy to read.
- Positive themes: Feedback mentions versatility across battery types and perceived value.
- Mixed feedback: Feedback on charging time is mixed, with reports that charging can take a long time.
- Mixed feedback: Connectivity receives mixed feedback, though the supplied summary does not specify the issue.

## Frequently asked questions

### Can the Hulkman Sigma 5 jump-start a vehicle?
No. The listing says it must connect to an external AC source and identifies it as a charger and maintainer, not a car jump starter.
### Which batteries does the Sigma 5 support?
The listing specifies 6V and 12V lead-acid batteries and 12V LiFePO4 batteries. It gives a 6-50Ah range for 6V mode and conflicting 15 to 121Ah and 15-120Ah ranges for 12V mode.
### What is included in the package?
The explicit contents list names battery clamps, battery eyelets, a bracket, two screws, the Sigma 5 charger, a user manual and warranty wording. A separate feature claim describes 3-year customer service, while the details list a 2-year warranty, so confirm warranty terms.

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## Add-ons

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## Images

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 1](https://best-deals.pro/i/_SrOQXzhEUSiWkkCPYn91u_HLQyzW2E-1vy-B2thEjZcYwPkrcgS3zktWH3T5ADCi6reyVzoDb8kmKGTVevwAQ1d5tfk6TViOFy1ZMEquRZ9QUiZvG6GrcZ0.jpg)

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 2](https://best-deals.pro/i/ZHhaIPNsFfi8uhd3EOzPew_kERI7Qw8_lFCWFHo1lVXNZq5YhI84zyfKR3nz6syMJSXeyn00Cz0I1j0IadIER4McIxRYpPf0duWMDOHVJaTD-eZ0UJ6vmcDR.jpg)

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 3](https://best-deals.pro/i/t-2zpHXC-74t6a8y8LCyKrlukA7dJ_l8bXaUpCv4w4_1mSNFDQu-zaCDmhnINf4BZ8s6f31p4eFepa-5xextjLoOEpA1cMA6n97C1WjIMGbA_-v8jhkfQYWu.jpg)

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 4](https://best-deals.pro/i/3eGnZMDaZbVqg8G3eVbceLAer3fw3Q22nsnDRmgmTUTVuz9aLs9qLuC0SsklfxJ5fGiWytCm2qiY5Frb8LuJq03kXU8Xou8vEdAoJKOFB1nhCu9LaJbNiRzM.jpg)

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 5](https://best-deals.pro/i/1ZKmt5FzgjyWxAGJg0Y-NZ3EeqYCv08CKOR3z8O9TA5HcWmUOaLcH56MjlMQhx-86RYHLZdR9GEgXZdXbjaNlW1VhmZVMnm4yDYS3dqtvxaQLGgCMGIG_VQ-.jpg)

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 6](https://best-deals.pro/i/UoYX3vcyB2e-qv2aReqd2H6BkYBuTu73NCZX2Do_-8W13K4XAEIyUs3VxhqyIOUrJxCuMLdMkMFhk01VdFBjEOD538-mE5Zg4pqAH1aV9s5NxPkGdkAlIOkZ.jpg)

![Hulkman Sigma 5 5A 6V/12V Battery Charger — 7](https://best-deals.pro/i/HgsXq8i4uUNzJYobemmZoJeYbw9KioTmR37Hc10XZP5K8UNwbquBrLFRyZHAwgi1CfzggxMxErkvYPC7NI0i6OPksEjIO4BtdV-jpV-_NSiWa4K40dSL57HK.jpg)