LifeLine batteries and Pentair (Shurflo).
These 2 companies have second to none customer service.
I'm extremely happy with the service they've given us while on the road.
I had a Shurflo water pump on a dive boat fail outside of the warranty period. I pulled out the pump and found that the pressure sensor had failed. I called customer service and asked about it. The person on the phone said he was surprised that it failed so soon and sent me a new pressure sensor at no charge and no shipping charge. The pump is still working well.
Wonderful customer service makes loyal customers. I've bought several more Shurflo pumps since then.
Harold