I recently received a purchase of two adapters and an RN4072 and a Joye 302 atty. The adapters are 510 battery to 801 atty. But while the adapter seems to work ok with the RN4072, it isn't working at all with the 302. I know that though compatible, the 801, RN4072, Joye 302 are not identical. But I'd hoped to be able to use the 510 to 302 combination. Does anyone know of an adapter that will work with this combination?