| Joined: | Wed Apr 11th, 2012 |
| Location: | Denham, United Kingdom |
| Posts: | 293 |
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Once a battery has gone below a predetermined, critical voltage, NOT to zero, then it can become unstable and dangerous to attempt to re-charge it, that's why if a battery has gone below the critical voltage, the correct charger should refuse to charge it.Absolutely correct, and very expensive when a set of cells costs $64,000! Boeing reasoned, correctly in my opinion, that it was better to allow a complete discharge than have the battery die just short of an airport. A 787 costs rather more than $64,000.