![I just bought my first HPA build used. Two questions. What kind of smart charger should I get for this tiny 7.4v battery and what is that white paper looking thing inside I just bought my first HPA build used. Two questions. What kind of smart charger should I get for this tiny 7.4v battery and what is that white paper looking thing inside](https://preview.redd.it/i-just-bought-my-first-hpa-build-used-two-questions-what-v0-8jk2zz93hjsa1.jpg?width=3024&format=pjpg&auto=webp&s=c6f87a0d3f8a7b0a56519f402938c63967cf86db)
I just bought my first HPA build used. Two questions. What kind of smart charger should I get for this tiny 7.4v battery and what is that white paper looking thing inside
![Yustda 24V AC/DC Adapter Compatible with Kodak HPA-602425U1 MPA7601 HB04Y07773A Sony AC-S2422 DPP-FP85 DPP-FP85B Digital Photo Printer Picture Station 24VDC Power Supply Cord Battery Charger PSU - Walmart.com Yustda 24V AC/DC Adapter Compatible with Kodak HPA-602425U1 MPA7601 HB04Y07773A Sony AC-S2422 DPP-FP85 DPP-FP85B Digital Photo Printer Picture Station 24VDC Power Supply Cord Battery Charger PSU - Walmart.com](https://i5.walmartimages.com/asr/59d058fa-e9de-4564-81c4-d55251d844b0.9dd144782c7ca0ecaf9587e355c6a306.jpeg?odnHeight=2000&odnWidth=2000&odnBg=FFFFFF)
Yustda 24V AC/DC Adapter Compatible with Kodak HPA-602425U1 MPA7601 HB04Y07773A Sony AC-S2422 DPP-FP85 DPP-FP85B Digital Photo Printer Picture Station 24VDC Power Supply Cord Battery Charger PSU - Walmart.com
![G&P 7.4v 380mAh LiPo Battery for HPA Engines with JST plug, Accessories & Parts, Batteries, LiPoly / Lithium Cell Batteries, 7.4V Lithium Polymer Batteries - Evike.com Airsoft Superstore G&P 7.4v 380mAh LiPo Battery for HPA Engines with JST plug, Accessories & Parts, Batteries, LiPoly / Lithium Cell Batteries, 7.4V Lithium Polymer Batteries - Evike.com Airsoft Superstore](https://www.evike.com/images/large/gp-77105.jpg)
G&P 7.4v 380mAh LiPo Battery for HPA Engines with JST plug, Accessories & Parts, Batteries, LiPoly / Lithium Cell Batteries, 7.4V Lithium Polymer Batteries - Evike.com Airsoft Superstore
![Tenergy 2-bay Universal Battery Charger for Li-ion/NiMH with LCD, Micro USB input - US Airsoft, Inc. Tenergy 2-bay Universal Battery Charger for Li-ion/NiMH with LCD, Micro USB input - US Airsoft, Inc.](https://cdn.shoplightspeed.com/shops/628197/files/57391059/tenergy-tenergy-2-bay-universal-battery-charger-fo.jpg)
Tenergy 2-bay Universal Battery Charger for Li-ion/NiMH with LCD, Micro USB input - US Airsoft, Inc.
![Amazon.com: Clover Airsoft - Amped HPA 7.4V 250 MaH LiPO Battery - JST Connector : Sports & Outdoors Amazon.com: Clover Airsoft - Amped HPA 7.4V 250 MaH LiPO Battery - JST Connector : Sports & Outdoors](https://m.media-amazon.com/images/I/51ObrKsRchL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Clover Airsoft - Amped HPA 7.4V 250 MaH LiPO Battery - JST Connector : Sports & Outdoors
![Amazon.com: Clover Airsoft - Amped HPA 7.4V 250 MaH LiPO Battery - JST Connector : Sports & Outdoors Amazon.com: Clover Airsoft - Amped HPA 7.4V 250 MaH LiPO Battery - JST Connector : Sports & Outdoors](https://m.media-amazon.com/images/I/51ObrKsRchL.jpg)