For batteries rated up to 85Ah
The ideal charger for everyday use
Fast, all weather charging
The MXS 3.8 is an advanced battery charger and maintainer. It has selectable programs for use on different sized batteries and special programs for desulphation, and charging on cold days.
The MXS 3.8 microprocessor controlled 7 step battery charger and maintainer is suitable for batteries from 1.2Ah-85Ah. Features include battery diagnosis to establish whether your battery can receive and retain a charge, a patented desulphation program and a ‘Snowflake’ program for charging on cold days. It also includes selectable programs for charging smaller and normal batteries. The MXS 3.8 uses CTEK’s patented float/pulse system, which is the most efficient maintenance mode when a battery is connected for long periods. The MXS 3.8 is simple to use and you can follow the whole charging process on the clear, easy to read display.
- Fully automatic ‘click and connect’ 7 step charging
- Smaller battery, normal battery and cold weather programs
- Charges batteries up to 85A
- Reverse polarity protected
- 5-year warranty
In the box:
- Crocodile Clips
- M6 Eyelets (for permanent connections)
- Carry Bag
Why do Groves sell this and what are our recommendations?
CTEK boasts incredible popularity in the battery aftercare market due to how well their products work. Using their chargers is extremely easy and can provide a ‘connect and forget’ battery charging solution; we even use them ourselves at our workshop.
They are fully automatic which means you can leave them on charge and they will switch themselves off when they are done.
When a battery is not in use, we recommend charging once every 3 months or so.
We recommend this charger if you:
The MXS 3.8 is great for charging smaller batteries, and maintaining larger batteries – the larger batteries will take a while on this charger. Perfect choice for motorcyclists who have alarms / immobilisers on their bikes. Perfect if you plan to keep the charger connected for several days / weeks / months.
We would not recommend this charger for leisure batteries.
Input: 220–240VAC, 50–60Hz, 0.5A max
Output: 14.4V/14.7V, 3.8A max
Start voltage: 2.0V
Back current drain*: Corresponding to less than 1Ah/month
Ambient temperature: -20˚C to +50˚C
Battery types: All types of lead-acid batteries, 12V, WET, MF, Ca/Ca, AGM, GEL
Battery capacity: 1.2–130Ah
Warranty: 5 years
Insulation class: IP65
Why do batteries need to be charged?
With a fully charged battery you don’t have to worry about whether your sports car or motorbike will start after a winter stored away. You have full control and avoid any unpleasant surprises. In addition, the battery remains in top condition, and you can rest assured it will work correctly. Regular charging also prolongs battery lifespan.
When should batteries be charged?
All batteries self-discharge to some extent, but the amount depends on the temperature. If the battery’s no-load voltage drops to 12.4 V or less for an extended period, sulfation increases, which impairs charging. So it is important to keep the no-load voltage high, even if the battery is not being used. This applies, for example, to batteries for pleasure boats, motorbikes and other vehicles that are only used part of the year. You can do this either by charging the battery at intervals or through continuous maintenance charging.