# Transmit/receive power comsuption

**URL:** <https://forums.digi.com/t/transmit-receive-power-comsuption/15803>\
**Category:** XBee - 802.15.4\
**Tags:** series1, consumption, xbee\
**Created:** [November 17, 2015, 10:12pm UTC](https://forums.digi.com/t/transmit-receive-power-comsuption/15803 "2015-11-17T22:12:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![willow](https://avatars.discourse-cdn.com/v4/letter/w/c37758/32.png) [@willow](https://forums.digi.com/u/willow)\
**Post date:** [November 17, 2015, 10:12pm UTC](https://forums.digi.com/t/transmit-receive-power-comsuption/15803/1 "2015-11-17T22:12:38Z")

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According to the datasheet the Xbee series 1 requires 45mA to transmit and 50mA to receive but in this calculations how many bytes or for how long is transmitting/receiving?  
If I want to calculate the power comsumption of transmitting 50 bytes, how can I do it from that info?

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [November 18, 2015, 11:03am UTC](https://forums.digi.com/t/transmit-receive-power-comsuption/15803/2 "2015-11-18T11:03:44Z")

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I would suggest using the battery life calculator located at [http://knowledge.digi.com/articles/Knowledge\_Base\_Article/Low-power-operation-for-telephone-modem-interface-board-PKG-T/?q=Battery+life+calculator&amp;l=en\_US&amp;fs=Search&amp;pn=1](http://knowledge.digi.com/articles/Knowledge_Base_Article/Low-power-operation-for-telephone-modem-interface-board-PKG-T/?q=Battery+life+calculator&amp;l=en_US&amp;fs=Search&amp;pn=1). It will allow you to determine exactly how long it takes to transmit data at any size you tell it.