At 915MHz, a single wall might be sufficient to halve the range, but anyway many FO users would be happy to get even 100 feet range reliably!
Are those NiMH or "Rechargeable Alkalines"? However, both have "issues". NiMH cells only deliver a nominal 1.2 volts each, so the transmitter power may well be reduced from that with fresh 1.5 volt Alkalines. But Rechargeable Alkalines (which the manufacturer "recommends") are basically a "rubbish" technology and may soon fail to charge at all, to a satisfactory voltage.fireman5214 wrote:also has fresh rechargeable energizer batteries, they were charged when installed and then the solar charger is supposed to take over for charging them daily.
Probably the best technology to try is NON-rechargeable Lithium AA cells. Expensive, but they deliver about 1.6 volts per cell over most of their (long) life (assuming that there are no other faults with the FO Solar Pod).
Cheers, Alan.