406 EPIRB with User Replaceable Battery

I wrote recently about the poor product support for EPIRB's over 10 years of age. Most of the manufacturers won't do it. You can read about that here.
Today, while in a Chandlery, I came across an EPIRB with stated "user replaceable battery". I have blogged about that one with the manufacturers details here and there is another manufacturer purporting a user replacement here.
Here's the blurb from Kannad Marine about their Safelink EPIRB (with GPS).

This ultra compact and stylish 406 MHz EPIRB comes with a built in high accuracy GPS as standard, for enhanced position location and a user replaceable battery* with a 6 year life.
Meeting the demands of both commercial mariners and recreational boaters, the new Safelink EPIRB heralds the arrival of the next generation in EPIRB technology. The Safelink EPIRB range offers two models, one features a manual deployment bracket and the other an automatic deployment housing which also includes a hydrostatic release unit.
This ultra compact and stylish 406 MHz EPIRB comes with a built in high accuracy GPS as standard, for enhanced position location and a user replaceable battery* with a 6 year life.
The Safelink EPIRB range offers two models, one features a manual deployment bracket and the other an automatic deployment housing which also includes a hydrostatic release unit. The Safelink 406 MHz EPIRB is designed to operate with the COSPAS-SARSAT international search and rescue system. The unit can be activated automatically by immersion in water, or manually by following the activation instructions printed on the unit.
The built in GPS receiver ensures that an accurate position of a casualty is relayed to the rescue services. This in turn improves the speed of recovery by updating the position of the beacon at regular intervals.

Key Features:

• FCC approved
• Internationally approved
• Ultra compact and stylish
• Transmits on 406 and 121.5 MHz
• Integral 20 channel GPS
• User replaceable battery* (leisure users only)
• High brightness LED flashing locator light
• 72 comprehensive diagnostic and self-tests during battery life
• Once activated, will transmit for a minimum of 48 hours
• 6 year battery life
• 5 year warranty
• Non hazardous battery for safe and easy transportation

[download a full spec sheet]