I am considering replacing the battery in #9517 with a lightweight lithium battery from Antigravity. The weight saving of approximately 35 lbs is significant. However, the cost, by the time I get it to Canada with all the crazy taxes, brokerage fees, duties, exchange and shipping will easily be five times the cost of a lead acid battery purchased locally.
The other factor is durability. I have read mixed reviews on this, and if the battery will not last very long then the cost will obviously not justify the expense.
Antigravity has a detailed video on their website discussing the benefits of their product, and it covers these concerns:
However, I would prefer to make a decision based on first hand experience, so I am wondering if anyone has purchased a battery from Antigravity and, if so, what your experience has been. Also, are there any other manufacturers of a similar product that anyone has had a good experience with?