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Trinity TR122003 DPD Dyna Pro Digital Discharger.

Discharges and conditions 4, 5 or 6 cell side by side packs.
Discharges 4 or 6 cell stick packs, with external leads.
30 A Dyna Pulse™ discharge.
5 A linear discharge.
Adjustable:
Cut off voltage, Number of cells, 4 or 6 cell internal, 4 to 9 cell external, Pulse or linear discharge, Internal or external charging modes.
Displays individual cell and total pack results, discharge time, average voltage, internal resistance, mAh. Superior battery clamping system for positive contact.
No power supply needed; runs off AA batteries.

Used 1/2 dozen times.
£100 New.
Will sell for £60 posted.
Paypal Accepted.