Although less common, the battery charger surely has its failures. The combination of large current spikes, high charge rates and oxidising connectors gives the battery charger a lot to endure. Fortunately, most modern chargers use a poly switch fuse in order to prevent short circuiting by reversed polarity.
It’s really important to respect safety standards like EN 60950 and EN 60335-2-29. Alec GmbH always makes sure that all remanufactured components at least meet all standards a new component has to comply with. Since we always strive to improve parts where possible, our final product can’t only be regarded as a new product, but also as a high-quality upgrade.