Having a product that can be hardwired but still requires you to remove and recharge the battery is a product fail in my opinion. Having it hardwired basically does nothing if it only is able to insufficiently trickle charge the battery. And why would anyone want to wait 5-10 hours to recharge a battery. Either improve the charging speed or provide 2 batteries when it is purchased.
Also why did Ring 3 instructions originally indicate a resistor was needed when wiring to transformer but now indicate one is not needed?