PatR
Premium Pilot
There ya go. A lipo has a useful life of roughly 2 years. From that point on they degrade. Battery inventories should be such that all new batteries are sold within the first year from date of manufacture with new production occurring as inventories draw down. OTOH, a manufacturer can obtain a lot lower unit pricing if they contract for one very large order instead of a number of smaller orders. As the H battery is cased and employs 2 circuit boards the need for those items adds additional levels of unit pricing to the equation.
As the H was first scheduled to be released in March of 2016 all the batteries needed to fulfill initial sales would have been produced prior to that date, with successive production runs occurring to back fill inventory in quantities determined by aircraft sales rates and data developed from the sale of battery spares. I think we all know H sales have fallen off considerably from the rate experienced during the first 8 months after the release that finally occurred in May 2016
I have yet to see a new Yuneec H battery date later than 2016, so the so called “new” Yuneec batteries are not new at all, and on their last legs when the buyer receives one. The cell IR values tell the story. Anything more than 4mOhm is already heading downhill. A new cell should have an IR value of 1 to 2mOhm. IR increases through the breakdown of lithium chemistries and improper use and storage. The rate of lithium chemistry breakdown is predictable, which is how a 2 year life cycle was derived, when they are used correctly. Misuse accelerates breakdown.
As the H was first scheduled to be released in March of 2016 all the batteries needed to fulfill initial sales would have been produced prior to that date, with successive production runs occurring to back fill inventory in quantities determined by aircraft sales rates and data developed from the sale of battery spares. I think we all know H sales have fallen off considerably from the rate experienced during the first 8 months after the release that finally occurred in May 2016
I have yet to see a new Yuneec H battery date later than 2016, so the so called “new” Yuneec batteries are not new at all, and on their last legs when the buyer receives one. The cell IR values tell the story. Anything more than 4mOhm is already heading downhill. A new cell should have an IR value of 1 to 2mOhm. IR increases through the breakdown of lithium chemistries and improper use and storage. The rate of lithium chemistry breakdown is predictable, which is how a 2 year life cycle was derived, when they are used correctly. Misuse accelerates breakdown.
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