These are some of the main differences:
14 Nimh (jr) vrs 24 cells
5 Amp charge max (jr) vrs 7 Amp
1 Amp discharge (jr) vrs 3 Amp
If you want to venture into the 28 Volt arena (LarryK14 for instance), the Triton2 is needed.
Triton Jr.:
Input Voltage: 10-15V DC
Battery Types, # of cells: 1-14 NiCd/NiMH
1-4 LiPo/Li-Ion (3.6 or 3.7V cells)
2, 4, 6, 8, 10, 12V Pb
Fast Charge Current: 0.1-5.0A NiCd/NiMH (0.1A step, 63W max.)
1C rating LiPo/Li-Ion (63W max.)
Peak delay at start: 3 minutes fixed
Discharge Current: 0.1-1.0A (0.01 step, 5W max.)
Cycle count: 1 to 5
Battery Memory: one
Display Type: 2 x 16 LCD, blue backlight
Case Size: 4.7 x 3.6 x 1.2 in (118 x 92 x 30 mm)
Weight: 13.1 oz (371 g)
Triton2:
Input Voltage: 11.0V – 15.0V DC
Input connections: banana plugs with mating alligator clips
Number of outputs: one
Battery types, # cells: 1-24 NiCd/MH (1.2-28.0V)
1-5 LiPo or Li-Ion (3.6-18.5V)
6, 12, 24V Pb (2V per cell)
Fast charge current: 0.1-7.0A linear NiCd/MH (0.1A step, 90W max)
1C rating for LiPo/Li-Ion (90W max)
Fast charge termination: "zero deltaV" peak detection NiCd/MH
"cc/cv" for Pb and Li-Ion/LiPo
* optional thermal cutoff for all battery types
Peak sensitivity: NiCd 5-20mV, NiMH 3-15mV
Peak delay at start: 0-60 minutes
Trickle charge current: 0-250mA (NiCd/MH only)
Fast charge safety timer: 0-990 minutes
NiMH max. charge capacity: 0-9900mAh
NiMH top off charge: 0-1000mA
Thermal cutoff: *50-150°F (10-65°C)
Discharge current: 0.1-3.0A
Discharge cutoff voltage: NiCd/MH 0.5-1.16V per cell
(0.9V/cell fixed during cycle)
Pb fixed at 1.8V per cell
Li-Ion/LiPo fixed at 2.8V per cell
Cycle count: 1-10 cycles (NiCd/MH only)
Cycle time delay: 1-60 minutes
Battery memories: 10 battery memories
Programming controls: modified jog dial, 2 pushbuttons
Display type: 2 x 16 LCD with blue backlight
Displayed info: input and output volts, peak volts, average discharge volts, charge and discharge capacity, currents and time, data for 10 cycles, errors
Audible indicators: 10 melodies, on/off
Output connectors: banana jacks
Case material: extruded aluminum
Cooling system: built-in fan
Current overload: solid state
Case size: 6.2 x 4.0 x 2.0 in (157 x 102 x 51mm)
Weight: 16.4 oz. (466g)