Einhell CE-BC 4M: our full review

Forty dollars for a smart charger with IP65 waterproofing, an LCD screen, and a dedicated winter mode: the CE-BC 4M delivers most of what a three-times-pricier charger offers, with one real limit, no lithium.

Our rating
3.8/5
Actual charging current: 3.4 out of 5 (weighting 30%)Charging3.4Battery compatibility: 3.2 out of 5 (weighting 25%)Compatibility3.2Safety and protections: 4.4 out of 5 (weighting 20%)Safety4.4Build and endurance: 4.4 out of 5 (weighting 15%)Build4.4Cables and connectors: 4.0 out of 5 (weighting 10%)Cables4.0

How is this rating calculated?

Einhell CE-BC 4M IP65 waterproof battery charger

The essentials

The CE-BC 4M owes its reputation to its value for money: at forty dollars, it delivers most of what three-times-pricier models offer. Microprocessor control breaks charging into successive stages, the maintenance function lets you leave it plugged in all winter, and the IP65 rating is rare at this price, allowing for a damp garage or an open shed. Winter mode below 5°C isn't a gimmick either. Two limits worth knowing: 4A stays comfortable for a compact car or motorcycle but slow on a large diesel wagon battery, and it doesn't handle lithium LiFePO4 batteries, increasingly common on RVs. For everything else, it's hard to beat at this price.

Strengths

  • Rare value for money: most of a premium charger's features for around $45
  • IP65 waterproofing, exceptional at this price, allowing for a damp garage or garden shed
  • LCD screen showing voltage and charging progress
  • Dedicated winter mode below 5°C, so a cold battery isn't stressed as if it were summer
  • Maintenance function that lets you leave it plugged in through the entire off-season

Limitations

  • 4A stays slow on a large, deeply drained diesel wagon or RV battery
  • Doesn't handle lithium LiFePO4 batteries, unlike the CE-BC 5M or the Noco Genius5
  • Only 6V and 12V, no 24V version for heavier vehicles
  • No reconditioning or desulfation function mentioned
  • No independent measurement confirms the exact charging time on a 100Ah battery
Einhell CE-BC 4 M Battery Charger: see the full details and price →

A smart charger with microprocessor control

A modern battery charger no longer just sends current until the battery is full. The CE-BC 4M belongs to the family of so-called smart chargers, controlled by a microprocessor, which analyze the battery's state and break charging into several successive phases.

4 A
Max current
IP65
Waterproofing
2
Voltages supported (6V/12V)

IP65 and winter mode, rare at this price

The IP65 protection rating is rare in this price range. The first digit indicates total dust resistance, the second resistance to low-pressure water jets. In practice, the charger handles a damp garage, an open shed, or a dusty workshop without any special precautions. Winter mode, activated below 5°C, adapts the charging profile to a cold battery's behavior, which accepts current less readily.

Maintenance charging, the most relevant use case

Once the battery is full, the charger doesn't stop abruptly: it monitors voltage and feeds small amounts of current back in when it drops. You can therefore leave it plugged in for weeks, or the entire off-season, with no overcharge risk. An LCD screen continuously shows the measured voltage and charging progress.

4A and no lithium, the two limits to know

On the power side, the unit delivers up to 4 amps and accepts both 6V and 12V, covering batteries for motorcycles, scooters, riding mowers, cars, and small vans.

Worth knowing: four amps is comfortable for a compact car or motorcycle battery, but slow on a large diesel wagon or RV battery, expect a full night for a deeply drained 100Ah pack. And it doesn't handle lithium LiFePO4 batteries, increasingly common on RVs and boats.

Who the CE-BC 4M is for

On the features that matter to a private user, the CE-BC 4M nearly matches devices twice as expensive, like the CTEK MXS 5.0 or the Noco Genius5. The real question is chemistry: if you have LiFePO4 in the garage, go straight for the CE-BC 5M for a bit more.

The rating in detail

Our rating
3.8/5
Actual charging current 3.4
Battery compatibility 3.2
Safety and protections 4.4
Build and endurance 4.4
Cables and connectors 4.0
Actually delivered power not measured
Multi-port power sharing not measured
Protocol compatibility not measured
Size and technology not measured
Format and chemistry compatibility not measured
Charging precision not measured
Display and control not measured
Einhell CE-BC 4 M Battery Charger: see the full details and price →

The product and its alternatives

Einhell CE-BC 4 M Battery Charger

Einhell CE-BC 4 M Battery Charger

$45.10 (26)

Thirty-five pounds for a smart, IP65-sealed charger that handles gel, AGM and lead-acid, and can stay plugged in all winter without a second thought.

View product
Einhell CE-BC 5 M LiFePO4 Charger

Einhell CE-BC 5 M LiFePO4 Charger

(5)

The only charger in our selection at under fifty pounds that handles a lead-acid car battery and a LiFePO4 lithium pack equally well.

View product
Bosch C30 Charger

Bosch C30 Charger

$96.73 (22)

The charger you find in every other garage: simple, robust, rated for batteries up to 120 Ah, and made by the world's largest automotive supplier.

View product

Frequently asked questions

Yes, that's even its most relevant use. The maintenance function monitors voltage once the battery is full and feeds small amounts of current back in when it drops, with no overcharge risk.

No, this model is built for lead-acid, gel, AGM, and maintenance-free batteries. For lithium iron phosphate, the CE-BC 5M LiFePO4 version is needed.

At 4 amps, expect about ten hours for a half-drained 45Ah compact car battery, and a full night for a deeply drained 100Ah battery.

It tolerates dust and water splashes, so a damp garage or an open shed aren't a problem. IP65 doesn't mean submersion: avoid leaving it out in heavy rain.