Kyros MID7015 died
- Thread starter PinkiPad
- Start date
- Mar 24, 2011
- 15,785
- 1,813
It's possible the battery has been damaged by improper storage and will need to be replaced.
Over-discharging Lithium-ion
Li-ion should never be discharged too low, and there are several safeguards to prevent this from happening. The equipment cuts off when the battery discharges to about 3.0V/cell, stopping the current flow. If the discharge continues to about 2.70V/cell or lower, the battery’s protection circuit puts the battery into a sleep mode. This renders the pack unserviceable and a recharge with most chargers is not possible. To prevent a battery from falling asleep, apply a partial charge before a long storage period.
Battery manufacturers ship batteries with a 40 percent charge. The low charge state reduces aging-related stress while allowing some self-discharge during storage. To minimize the current flow for the protection circuit before the battery is sold, advanced Li-ion packs feature a sleep mode that disables the protection circuit until activated by a brief charge or discharge. Once engaged, the battery remains operational and the on state can no longer be switched back to the standby mode.
Do not recharge lithium-ion if a cell has stayed at or below 1.5V for more than a week. Copper shunts may have formed inside the cells that can lead to a partial or total electrical short. If recharged, the cells might become unstable, causing excessive heat or showing other anomalies. Li-ion packs that have been under stress are more sensitive to mechanical abuse, such as vibration, dropping and exposure to heat.
From this article: Charging Lithium-Ion Batteries
Over-discharging Lithium-ion
Li-ion should never be discharged too low, and there are several safeguards to prevent this from happening. The equipment cuts off when the battery discharges to about 3.0V/cell, stopping the current flow. If the discharge continues to about 2.70V/cell or lower, the battery’s protection circuit puts the battery into a sleep mode. This renders the pack unserviceable and a recharge with most chargers is not possible. To prevent a battery from falling asleep, apply a partial charge before a long storage period.
Battery manufacturers ship batteries with a 40 percent charge. The low charge state reduces aging-related stress while allowing some self-discharge during storage. To minimize the current flow for the protection circuit before the battery is sold, advanced Li-ion packs feature a sleep mode that disables the protection circuit until activated by a brief charge or discharge. Once engaged, the battery remains operational and the on state can no longer be switched back to the standby mode.
Do not recharge lithium-ion if a cell has stayed at or below 1.5V for more than a week. Copper shunts may have formed inside the cells that can lead to a partial or total electrical short. If recharged, the cells might become unstable, causing excessive heat or showing other anomalies. Li-ion packs that have been under stress are more sensitive to mechanical abuse, such as vibration, dropping and exposure to heat.
From this article: Charging Lithium-Ion Batteries
- Thread starter
- #3
Thanks. Odd how it just discharged like that.
Assuming the battery needs to be replaced, what type specifically do i need? I will get it at Amazon but need specifics. I have Lithium-ION, about the size of a nickel, but they aren't close to me to check the specific siz
And, is there a site that reminds me how to change battery? The instruction book is MIA.
PS: Found the user guide online as well as the answer to my problem. I'm screwed.
2450mah 3.7v. you have to desolder the red and black leads off the board.
Guess I can try to sell it or something...
Assuming the battery needs to be replaced, what type specifically do i need? I will get it at Amazon but need specifics. I have Lithium-ION, about the size of a nickel, but they aren't close to me to check the specific siz
And, is there a site that reminds me how to change battery? The instruction book is MIA.
PS: Found the user guide online as well as the answer to my problem. I'm screwed.
2450mah 3.7v. you have to desolder the red and black leads off the board.
Guess I can try to sell it or something...
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