Who is correct in their approach to recharging a sulfated battery?

Trickle charging is considered a better method for recharging a sulfated battery because it allows for a slow, controlled charge that can help dissolve the sulfate crystals that have built up on the battery plates. Sulfation occurs when a lead-acid battery is left in a discharged state for an extended period, and it can reduce the battery's capacity and lifespan.

Trickle charging works by supplying a consistent, low level of current, which helps to gradually reverse the sulfation process without overheating the battery or causing additional damage. This method also helps ensure that the battery is fully charged without the risk of overcharging, which can be detrimental to battery health.

Fast charging, while it may seem beneficial for quickly restoring a battery's charge, does not allow for the necessary chemical reactions to properly reverse sulfation and can sometimes aggravate the issue by generating excessive heat, leading to further damage. Therefore, Technician B's approach of using trickle charging is more suitable for restoring a sulfated battery.