@CNCMan, if these were real 2800mAh cells, they’d have a lot of self discharge, and would probably self discharge in about a month. So, these are probably based on the 2700mAh Powerex cells, and these self-discharge in about 90 days.
Let me tell you a story:
What if I told you that the 3000mAh cell listings you see on eBay and AliExpress are actually based on real 3000mAh cells?
Once upon a time too, there were 3000mAh NiMH legit cells, but they had a self discharge rate so high they would usually drain in 2 weeks. That is because the cell is only packed with active material, which gives it very high capacity, but with a tiny separator and no chemical stabilizer, the remaining charge would dissipate extremely quickly, and drain the cell to 0% in 2 weeks as stated before. For that reason, the 3000mAh cells were very quickly taken out of the market.
When Panasonic came along, there was the regular Eneloop. There is an additive that forms a spinel structure inside of the cell, which means more note surface area is in contact with the ions inside of the cell, which grants it low resistance, along with much higher ion retention, meaning much lower rates of cell discharge. With much less active material, capacity was lowered to 1900mAh though. That was an excellent trade off though.
In the Eneloop Pro, there is still some spinal structure, but less of it, and in higher capacity cells, like 2700mAh, there is only active material, but self discharge is significantly higher, draining in 3 months.