- By default, we use the unregulated output of the battery directly
- to fire ejection charges. This works marvelously with standard
- low-current e-matches like the J-Tek from MJG Technologies, and with
- Quest Q2G2 igniters. However, if you want or need to use a separate
- pyro battery, check out the “External Pyro Battery” section in this
- manual for instructions on how to wire that up. The altimeters are
- designed to work with an external pyro battery of no more than 15 volts.
+ [WARNING]
+ Spark Fun sells batteries that have a matching connector with
+ the correct polarity. However, these batteries include an
+ integrated current limiting circuit. That circuit will cause
+ the battery to shut down when firing the igniter circuit. Do
+ not use these batteries unless you remove the current limiting
+ circuit.
+
+ By default, we use the unregulated output of the battery
+ directly to fire ejection charges. This works marvelously
+ with standard low-current e-matches like the J-Tek from MJG
+ Technologies, and with Quest Q2G2 igniters. However, if you
+ want or need to use a separate pyro battery, check out
+ <<_using_a_separate_pyro_battery>> for instructions on how to wire
+ that up. The altimeters are designed to work with an external
+ pyro battery of no more than 15 volts.