HaiZR STW-1206 12V/24V Battery Charger

HaiZR STW-1206 is a dual-voltage battery charger listed for 12V and 24V batteries, with a display intended to show charging information. The listing describes it as a 10-stage charger and maintainer, but its current figures conflict, so confirm the output for your intended battery before buying.

At a glance

The listing specifies separate 12V and 24V outputs and describes 12V 12A and 24V 6A charging modes.
The display is claimed to show charging status and battery information, including voltage and current.
Automatic charging, maintenance and pulse-repair functions are advertised. The listing says completely dead or severely damaged batteries cannot be restored.

Price

$33.99Save 15%

Reference price: ~~$39.99~~

Price checked: 13 Nov 2026

View offer

Pros and cons

Pros

Dual-voltage support may suit buyers maintaining both 12V and 24V batteries, subject to confirming the correct output mode.
A display showing charging status and battery readings can help monitor a charge without relying only on elapsed time.
The listing describes automatic charging and a maintenance mode for batteries kept in storage.

Cons

Not suitable for lithium batteries, according to the listing.

Technical specifications

16 specifications

Identity
Brand	HaiZR
Model	STW-1206

Charging and compatibility
Output voltage	12 Volts (DC), 24 Volts (DC)
Input voltage	220 Volts (AC)
Current rating	12 Amps
Amperage	24 Amps
Compatible devices	Cars, Trucks, Boats, Lawnmowers
Connector type	clamp connectors
Number of ports	1
Specification met	CE, FCC, RoHS

Display
Screen technology listed	LCD

Dimensions and installation
Dimensions listed	16D x 6.2W x 8.9H centimetres
Weight listed	0.5 Kilograms

Other details
Colour	red
Warranty description	2 year
Country of origin	China

What to know before buying

Listing details to confirm

The listing gives inconsistent current figures: the title and detail fields say 12 Amps and 24 Amps, while the feature text specifies 12V 12A and 24V 6A. It also describes the display as both colour LED and LCD, and its input details differ between 220 Volts (AC) and 110-240V (50-60Hz). Confirm the selected unit's output, input and display type before purchase. The listing also makes differing claims about leaving it connected after charging and automatic shutoff.

Who is it for?

A good fit for

Drivers maintaining compatible 12V lead-acid batteries in cars, 4WDs or motorcycles, after checking the charging requirements.
Owners of compatible 24V batteries who confirm the charger’s actual 24V output before use.
Buyers who want a display for monitoring charging information and a claimed maintenance mode.

Less suited to

Lithium battery owners, as the listing says the charger is not suitable for lithium batteries.
Anyone needing confirmed 24V current, input-voltage range or a clearly specified display type without checking the selected listing.

HaiZR STW-1206 12V/24V Battery Charger · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 13 ratings

5 stars70%70%
4 stars19%19%
3 stars11%11%
2 stars0%0%
1 star0%0%

Aggregate ratings lean positive, with most ratings in the five-star category and some three- and four-star ratings. The sample is small and there is no supplied written feedback, so it does not establish what customers liked or disliked. For buyers considering the listed display and dual-voltage capability, confirm the conflicting electrical details rather than treating the ratings as evidence of charging performance.

Frequently asked questions

Does this charger support both 12V and 24V batteries?

The listing claims both voltage options, but the output-current details conflict. Confirm the selected unit’s ratings and mode before connecting a battery.

What battery types does it support?

The listing describes support for AGM, GEL and SLA batteries and says it is not suitable for lithium batteries. Check compatibility with your battery’s specifications.

Can it recover a completely dead battery?

The listing says completely dead batteries cannot be restored to normal working condition and severely damaged batteries cannot be repaired.

What does the display show?

The listing claims it shows charging information such as voltage, current, battery level and operating mode. It describes the screen inconsistently as colour LED and LCD.