The Invicta Lithium range (formerly Sentry Batteries) is ideally suited for replacement of lead acid batteries in deep cycle applications. They include built in BMS and cell balancing.
Some models include IEC Certification on both the BMS and Cells. The IEC Certification is a huge tick of approval for safety and quality.
With the all new SNL range you can even monitor the health and status of your batteries on your phone via Bluetooth wireless communication.