That small of a battery could NOT send a signal of ordinary strength that far, so if they were using your mike to listen in they'd have to be parked nearly next door. Also, like a computer which has the same type of battery, the battery allows the phone to save settings, so if you take it out every time you turn your phone back on it will have to be reprogrammed for ops and it will probably lose all of you contacts and recorded text messages, missed calls and such. Every cell phone Ive ever taken that little battery out of lost all of it's stored preferences like earpiece volume and ringer settings. Face it, if you have and use a cell phone you are being tracked, and taking that battery put will do NOTHING to stop it. YOUR PHONE HAS A PASSIVE CHIP ACTIVATED BY SENSORS WITH AN EM SIGNAL THAT POWERS IT UP LOCATED ALL OVER THE PLACE LIKE AS YOU ENTER A DEPARTMENT STORE THAT ID'S YOU, OR AS YOU CROSS A BRIDGE WITH ONE OF THEM STRANGE LOOKING ANTENNAS LOCATED ON IT. IF YOU LOOK CLOSELY AT YOUR INSPECTION STICKER ON YOUR CAR (IN SOME STATES IT'S ON THE REGISTRATION STICKER}, YOU WILL SEE IMBEDDED IN IT A COIL OF FLATTENED ALUMINUM WIRE THAT HAS AN RFID CHIP ATTACHED THAT TRACKS YOUR CAR EVERYWHERE IT GOES. ALSO IF YOU LOOK AT YOUR LICENSE PLATE YOU WILL SEE A HOLOGRAPHIC IMAGE NEAR THE CENTER THAT IS USED BY TRAFFIC CAMERAS TO IDENTIFY YOUR CAR IN THE CASE YOU MIGHT HAVE USED FAKED OR SWITCHED PLATES.. SO YOU'RE BEING TRACKED NO MATTER WHAT PRECAUTIONS YOU TAKE OF YOU DRIVE OR CARRY A PHONE. EVEN MONEY HAS RFID TAGS EMBEDDED IN IT AND IF YOU GOT IT FROM A BANK THE RFID TAGS ARE READ BEFORE IT IS HANDED OUT TO YOU, MEANING IF YOU SPEND IT THEY KNOW WHO YOU ARE AND WHAT YOU SPENT IT ON. WHEN YOU ENTER A STORE WITH THEM BLACK SENSORS YOU HAVE TO WALK THROUGH, THEY COUNT YOUR MONEY AND IDENTIFY YOUR THROUGH YOUR CREDIT CARD CHIPS. IF YOU HAVE A RECORD OF SHOPLIFTING THEY WILL FOLLOW YOU ALL AROUND THE STORE