![]() I can repeat the above any day of the week with any rechargeable. If I put alkaline batteries in the R4 I am good to go for a few hours. 5 seconds and the batteries will go all day. I can put the same batteries into a Canon 580 flash, discharge at full power and my recycle time is approx. Here's the rub: I can put new, 2750 mah batteries into my R4 and if it powers up, it won't be for long. I should mention perhaps that the G2 handheld wireless mic will not run off NiMH batteries, it will not even power up however I don't think you can even fit Sennheiser's NiMH battery pack into that unit so it's almost certainly by design. This kind of fault could easily be overlooked during production testing. Try to determine if it's the transmitter or the receiver or even the mic. If a G2 is soundy fuzzy running off NiMH cells it's possibly faulty. They're mostly targetted for use in remote controls that draw such little power that the self discharge current would be greater than the current drawn by the device itself. I think it's Sanyo who first came out with a NiMH cell specifically designed for low self discharge. NiMH batteries over 2100mAH do self discharge faster however the difference is measured in weeks not days. In general the slow chargers are not recommended for high capacity NiMH batteries, the charging logic uses dv/dt and temperature to determine charge status, if you charge them too slowly then the dv/dt might not happen or not be detected and the batteries will be overcharged. Due to the lower voltage the indicator on the units may show one bar short of full capacity even with a fully charged battery. That can cause problems with some gear however Sennheiser do supply an optional battery and charger for the G2s that uses 2x NiMH cells so the units should work just fine with 1.2V cells, certainly the 8 that we have do. ![]() NiMH cells are 1.2V compared to Alkaline's 1.5V. Do you charge your rechargeables within 1 day of using them? ![]() Type (alkaline, or rechargeable) you are using, when you hear the distortion?Ĥ. What batteries (Brand, rated capacity in MAH (milliamp hours), andģ. How many bars you are seeing in the Sennheiser G2’s battery gauge, andĢ. As the batteries are used, both will go down in voltage.ġ. The difference between the 1.56 volts and the 1.40 volts is not significant. I have never had the fuzzy distortion that you are reporting. So, I would like to know what your G2 battery gauge is indicating when you have the fuzzy distortion.Įnergizer recently came out with a new type of NiMH battery that has slightly lower rated capacity, but does not lose the charge as quickly. There is still plenty of charge left in the NiMH to power the G2's for many hours. If you put fresh alkaline batteries in a G2, the battery gauge will read completely full.įreshly charged good NiMH batteries will also read completely full, but not for long. If you do not have (and do not want to get) a good digital voltmeter (and they do not cost much), then the battery gauge on the Sennheiser G2 units does a great job. It is easy to tell the best, from the good, from the weak, using a good voltmeter. I always try to measure the voltage of my batteries before I use them, and always charge them the night before, or the day before, a shoot. The key here is that many NiMH batteries lose their charge quickly. If you leave them on most chargers after the charge cycle is complete, then they will have lost some of their charge. I consider 1.38 volts and above to be fine. ![]() Good, fresh, just off the charger (taken off of the charger soon after the charge cycle is complete), Energizer NiMH batteries measure around 1.40 volts. Please note that good alkalines keep their charge much longer than rechargeables, which self-discharge fairly quickly if not used. I typically measure around 1.56 volts using Energizer non-rechargeables. Good, fresh, alkaline AA batteries usually have an initial voltage of over 1.5 volts.
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