Alkaline batteries do drain pretty fast. Sometimes within a couple of hours, when constantly scanning all channels (Especially when scanning MRN channel).Tips:1. Ensure the switch located under the batteries (in the battery compartment) is switched to match your battery type. Alkaline or Rechargeable.2. Limit the number of scanned channels to only those you want to listen to and avoid the MRN channel.3. Carry some extra rechargeable or alkaline batteries.4. Carry a power bank to the power scanner with the included USB cable. This also recharges the rechargeable batteries at the same time. (best method) (make sure rechargeable batteries are in there or remove alkaline batteries)