Fall 2015 MicroBiPed Battery Update

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BATTERY TRADE-OFF UPDATE

By Brian Walton (Manufacturing Engineer)
Approved by Paul Oo (Project Manager)
Approved by Railly Mateo (Systems Engineer)

Item Voltage Amphours Rating Quantity Price Per Qty
Dynamite LiPo Battery DYN 1419 7.4 V 2000 mAh 5C 1 $29.95
Lithium Ion Polymer Battery 3.7 V 2500 mAh 1C 2 $14.95
9V Battery 9V 120-1200mAh 1 $2+

The table above compares 3 possible batteries to use for the µBiPed project. The table compares supplied voltage, Amphours, rating, quantity, and price per quantity. The 3 batteries shown here on the table were chosen based off the updated mass and power reports.

Conclusion:
In the end we went with the Dynamite LiPo battery for multiple reasons:

  1. The price per quantity was negligible between the 7.4 and the 2 3.7 V batteries.
  2. While the 9V battery was cheaper short term, having rechargeable batteries are cheaper long term.
    1. Additionally this project being the feasibility demonstration of a toy, it’ll be better to have the toy already designed for rechargeable batteries.
  3. Even though the Lithium Ion had better rating for Amphours, the Dynamite Pro can handle better surges.