I recommend (before you upload any more images) that you find some way to reduce their size down to 640 x 480 pixels. If you presently have no photo editor, I suggest you visit http://www.irfanview.com/
and download "IrfanView". It is a free editor. I recognize it could be that you are not using a PC to communicate with this rr board, say an iPad. If that's the case, IrfanView probably won't work, but your iDevice, whatever it is, ought to have its own image editing capability.
mg06981 wrote:ok I found one that will tell me the voltage, I assume I should give it a full charge before trying to measure the voltage? ...
The first two cell & battery testers that you showed us will not help you with Roomba batteries -- they are dedicated to checking specific low-capacity cells and batteries by applying various calculated internal loads to selected cells under test. Even the model #10 7-2 tester having a 20V capacity would be unable to tell you much of use about your 14.4V, NOMINAL, NiMH battery.
Be aware that a freshly charged Roomba battery may read 16 to 17 volts across its terminals. The 14.4V level will be crossed through as the battery's charge is being depleted. Know also: 12-volts on the battery terminals is considered time to quit using the battery, so Roomba halts its cleaning session at that voltage.
Back on testers: The third tester, the #BT-100 will measure Roomba battery volts when less than "16V". You should not plan on throwing the RED load switch to "I" (since the load resistance is very low and intended for testing lead-acid auto batteries).
As vic7767 told you: It would be unwise for you to charge a Roomba battery with an auto-battery charger, even at the lowest current setting of "2A".