I'd still try to verify that. It's easy to solder up a test lead for your meter with a servo plug on the end. That will let you see what voltage your receiver is actually getting. If the old Nimh drops substantially when you pull on a servo, then you've found your culprit. If not, connectors are the likely suspect. I'm leery of flying anything that has shown a problem without positively identifying that problem and being sure I've eliminated it.