Samsung SGH-S275DAATFN - Manual (Page 12)

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To replace the battery:
1. Slide the battery into the phone with the gold contacts on the
battery matching those in the phone (1).
2. Press the battery down until it clicks into place (2).
3. Reinstall the battery cover by sliding it back onto the phone
(3 and 4) until you hear it securely click (5).
3