3.7V 2000mAh Rechargeable battery For PocketBook740 PocketBook 740 PRO JL18 A30 Battery|Replacement Batteries| - AliExpress
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NEW Replacement Battery for POCKETBOOK Pro 602, 603, 612, 902, 912, 920 1100Mah | eBay
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Amazon.com: Synergy Digital E Book E Reader Battery, Compatible with Pocketbook 626 Plus E Book E Reader, (Li-Pol, 3.7V, 1450mAh) Ultra High Capacity, Replacement for Pocketbook Battery : Electronics