Ring RCB320 12V 20A Heavy Duty Automatic Charger and Mains-Powered Jump Starter

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Quoting product code: A66TX


About this product


  • Suitable for 12V vehicles up to 12L
  • Use on lead acid and gel batteries
  • LED indicators and ammeter show the charge rate and charging status

Product overview

• Suitable for 12V vehicles up to 12L
• Use on lead acid and gel batteries
• LED indicators and ammeter show the charge rate and charging status
• Reverse polarity protection
• Fully insulated battery clamps included

Special features
• Fully automatic - protects from overcharging
• Robust metal and rubber body to withstand tough working conditions
• 80A mains-powered jump starter

What can I use this charger with?
Charge and protect your vehicle batteries with this high capacity, tough workshop charger. The RCB320 can be used to charge batteries in 12V vehicles up to 12L and has an 80A jump starter as well. Use on lead acid and gel batteries in many vehicle types, including cars, vans, motorhomes, caravans and boats.

Tough workshop charger
The RCB320 Charger is designed to withstand heavy use and harsh working conditions – it’s ideal for workshops and garages. As well as charging, it also protects vehicle batteries from overcharging. If a battery is overcharged, it can lead to the battery discharging quickly, becoming hot and, in extreme cases, leaking sulphuric acid. By switching to a lower voltage mode once it detects that the battery is full, the RCB320 Charger prevents this from happening.

Easy to use
Just plug into the mains and attach to the battery. The charger includes polarity protection, so if you attach the wrong clamp to the wrong pole, it won’t damage the battery – the polarity check LED will illuminate to let you know what the problem is.


Charging Voltage 12 V
Output Current 20 A
Compatible Battery Types Lead acid and gel
Cable Length 1.8 m
Colour Blue and grey
Width 253 mm
Depth 170 mm
Height 182 mm
Weight 6.72 kg
Output Voltage 12 V
Battery Capacity 20-225 Ah
Maximum Current 20 A
Charger Type Linear
Battery Conditioning/Repair No
Overcharge Protection Yes
Short Circuit Protection Yes
LED Indicator Yes
Display Type LED/Ammeter
Display Size 48 mm x 30 mm
Jumper Leads Yes
Cable Length 1.8 m
Polarity Indicators Yes
Power 154 W
Input Voltage 240 V
Shock Resistant N/A
IP Rated N/A

This is a 20amp charger but with a 80amp engine start so what amperage is the battery cable please (red/black)

Asked by: Kev koi
Unfortunately, this information has not been provided I can only assume that being produced by a reputable manufacturer that it will be the correct size for the job its intended to do.
Answered by: Dominic
Date published: 2018-01-09

May sound stupid but i need to check :D Does this have to be plugged into the mains in order to use it to jump start a car? Or is it mains charged, then unplugged and usable as a jump starter?

Asked by: SmartMac
Yes DaftMac, as the title suggests it is suitable for a workshop/garage environment. It CANNOT be used to jump start a car unless plugged in.
Answered by: SmartMac
Date published: 2016-12-29

can this charger charger a leisure battery that is 650WH, 12V, 142AH, 850A (eng)

Asked by: kitfindlay
Battery Capacity 20-225 Ah
Answered by: Dominic
Date published: 2016-12-13

Is this OK to use as a trickle charger for a car being laid up over winter?

Asked by: fred
Unfortunately we are unable to guarantee full compatibility for this item
Answered by: Dominic
Date published: 2016-11-15

Will this bump start a mercedes ml 270 cdi.        2.7 ltr

Asked by: Dumbblondecars
Suitable for 12V vehicles up to 12L
Answered by: James
Date published: 2017-11-13

Is the 80am start up option sufficient for a fiat punto battery when flat?

Asked by: pikosan
Yes, I am pleased to advise this jump starter should be sufficient to start a Punto.
Answered by: Russell
Date published: 2015-12-22
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