Panasonic eneloop, Ready to Use Ni-MH Battery AA Pack of 8, min.1900 mAh, 2100 Charging Cycles Low Self Discharge

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I think this is why Tado doesn't recommend other types of batteries. By observing their "very diligent" documentation style I can imagine that they don't want to recommend inserting fingers or tweezers into the battery compartment in case things go wrong. My understanding regarding other brands and capacities is that there is a question mark over physical fit. That would include the 2500 LADDAs, just like the larger Eneloops. The Panasonic Eneloop AA batteries are the latest multi-purpose batteries by Panasonic (formerly Sanyo Eneloop) providing long-life, pre-charged, energy and money saving, eco-friendly rechargeable batteries.

Panasonic Eneloop Rechargeable Batteries - Battery Station Panasonic Eneloop Rechargeable Batteries - Battery Station

https://community.tado.com/en-gb/discussion/3099/released-rechargeable-batteries-in-smart-radiator-thermostats-va02-hardware-revision Also, thinking this hypothesis out loud - What if VERY cheap non-standard battery types tend to heat up (event) at mechanically idle current and thus cause reading error? (I don't think anybody will do that though :) ) No, it is not necessary to fully discharge these batteries before recharging as they do not suffer from so called memory effect.

These batteries benefit from superior performance even at low temperatures down to -20 ℃ making them suitable for various conditions and occasions.

Panasonic eneloop AA Rechargeable Ready-To-Use Ni-MH

Recycle responsibly, a wide range of schemes are available. Most batteries rechargeable or non-rechargeable can be recycled.apparently the specific type of battery. eg Panasonic eneloop 1900mAh is important. Perhaps tado help are confusing the issue, and it's really about SIZE not TYPE, and its other issues that are causing battery failure. Perhaps it's both. But they need to be clear. Designed to be used for the regular battery consumers and professionals the Panasonic Eneloop rechargeable batteries are the perfect choice for powering medium to high current consuming devices such as Digital Cameras, torches, game controllers, radio-controlled toys and a range of household devices.