Victron Blue IP65 Smart Charger 12/10 + DC connector, 5 Years Warranty. The Blue Smart IP65 Charger is the new professional battery charger with built-in bluetooth. The Blue Smart IP65 Charger can be used on devices in your workshop and on motor vehicles, such as (classic) cars; motorbikes; boats and camper-vans.
The battery is charged, smartly... to perfect condition:
The seven-step charging algorithm gets the best out of your battery. The charger gives the battery the power it needs, maintains its health, ensures better performance... and a longer life.
Recovery of deeply-discharged 'dead' batteries:
Unlike other brands, the Blue Smart IP65 Charger will attempt to recharge a deeply-discharged battery by force-feeding it with a low current. Normal charging will then be resumed as soon as there is sufficient voltage across the battery terminals.
Connect the battery with ease:
The charger comes with both crocodile clips and M8 eyelets - making it easy to connect to the battery. If you wish, you can leave it permanently connected.
Check the status of your battery remotely:
The Blue Smart IP65 is equipped with built-in Bluetooth, so the status of the charger and the battery can be checked on a smartphone, tablet or laptop. All settings of the charger can be configured with the VictronConnect app. 
Water, dust and chemical resistant
Seven step smart charge algorithm
Recovery of fully discharged ‘dead’ batteries
Automatic power supply function
Severe cold performance: down to -30°C
Several other battery life enhancing features
Low power mode to charge smaller batteries
Li-ion battery mode
Setup and configure, readout of voltage and current
by Bluetooth Smart
Ultra high efficiency “green” battery charger:
 
With up to 95% efficiency, these chargers generate up to four timesless heat when compared to the industry standard. And once the battery is fully charged, power consumption reduces to 0,5 Watt, some five to ten times better than the industry standard.

Durable, safe and silent:
Low thermal stress on the electronic components.
Protection against ingress of dust, water and chemicals.
Protection against overheating: the output current will reduce as temperature increases up to 60°C, but the charger will not fail.
The chargers are totally silent: no cooling fan or any other moving parts.
Reconditioning:
 
A lead-acid battery that has been insufficiently charged or has been left discharged during days or weeks will deteriorate due to sulfa-tion. If caught in time, sulfation can sometimes be partially reversed by charging the battery with low current up to a higher voltage.

Recovery function for fully discharged batteries:
 
Most reverse polarity protected chargers will not recognize, and therefore not recharge a battery which has been discharged to zero or nearly zero Volts. The Blue Smart Charger however will attempt to recharge a fully discharged battery with low current and resume normal charging once sufficient voltage has developed across the battery terminals.