We have designed and build a battery swapping electronics “BattSwitch” that is based on our earlier uninterruptible battery source. BattSwitch can swap between 1-6 battery pairs and in addition it can contain linear voltage regulators to provide a stable and constant uninterruptible voltage supply for e.g. preamplifiers. Swapping can be controlled both manually and user-specified schemes using e.g. internal Raspberry Pi computer. Control signals from an external source (e.g. digital input/output card) can also be wired thru a rear-panel connector.
A tentative manual for further details here: