This is only my thoughts, and as you probably know my thoughts aren't always the best.
Use the Illume (iZup)software to solve the battery drain problem, if it was still a problem. Then market BOTH products, becoming our own biggest competition.
Both lots of software have their advantages and disadvantages, and I should imagine so do both companies.
Why put one lot of the software in the bin and give competition an advantage. I would rather have 2 shots out of 10 of a customer selecting my product over competition, rather than 1 shot out of 9.